HADITH 1

The 4 best words for DHIKR
The Prophet (saw) says:

Samura ibn Jundub reported that the Prophet said: "The dearest phrases to Allah are four: subhan Allah, wa al-hamdu lillah, wa la ilaha illallah, wallahu akbar: "Glorified is Allah, and Praise be to Allah, and There is no God but Allah, and Allah is most Great," There is no harm in beginning them in any order you choose while remembering Allah." (Narrated by Muslim)

HADITH 2
The Prophet (saw) says:

"Whoever glorifies Allah at the end of every Salaat 33 times (subhanallah), and praises Allah 33 times (Al-hamdulillah), and utters the word of Greatness 33 times, (Allahu Akbar) that is ninety nine, then completes it with one hundred, saying: `Laa ilaha illallah wahdahu laa sharika lahuu lahul Mulk wa lahul hamd wa huwa `alaa kulli shay in qadeer, his shortcomings will be forgiven, even if it is as large as the froth of the sea." (Muslim)

First Fact:

 Before we start talking about the Numerical Value,
let's talk about things around SHALAAT (prayer) .
See how the numbers are related each other.

Muslims shalaat 5 times / day.

In every move in their shalaat, Muslim recite the word "Allahu Akbar (Allah is most Great)".
Subh (Dawn) 11 times, Dhuhr (Noon) 22 times, Ashr (Afternoon) 22 times, Maghrib (Sunset)  17 times, dan Isya (Night)  22 times.
 Total: 11 + 22 + 22 + 17 + 22 = 94  times / day

In Rak'ats, Muslims shalaat 17 raka'ats / day.
Those are: Subh (Dawn) 2  raka'ats , Dhuhr (Noon) 4 raka'ats, Ashr (Afternoon) 4  raka'ats, Maghrib (Sunset)  3  raka'ats, dan Isya (Night)  4 raka'ats.
 Total: 2 + 4 + 4 + 3 + 4  = 17 raka'ats  / day

For Friday, Muslims MEN shalaat 15 raka'ats, bacause noon time they will pray in the mosque just 2 raka'ats.
 Total:  2 + 2 + 4 + 3 + 4  = 15

Every raka'ats, Muslims have to recite surah 1. Surah Al-Fatihah
Thus, in one day, Surah Al-Fatihah repeated 17  times.
 Subh (Dawn) 2  times, Dhur (Noon) 4 times, Ashr (Afternoon) 4  times, Maghrib (Sunset)  3  times, dan Isya (Night)  4 times.

Shalawat repeated 9 times
 Subh (Dawn) 1  times, Dhur (Noon) 2 raka'ats, Ashr (Afternoon) 2  raka'ats, Maghrib (Sunset)  2  raka'ats, dan Isya (Night) 2  raka'ats.

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5
Added: 23 April 2005
 The Prophet (saw) said: " Whoever glorifies Allah at the end of every Salaat 33 times (subhanallah), and praises Allah 33 times (Al-hamdulillah), and utters the word of Greatness 33 times, (Allahu Akbar).."

We know that Muslims  SHALAAT 5 times /day. Is this number has something to do with 33? YES.
5 is PRIME number no 3and ODD number no 3
So5 meet 3 and 3 or 33--------- 5-33
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Related to 19?
These are PRIME numbers from 2 to 5
2,3,5
These are ODD numbers from 1 to 5
1,3,5

2 + 3 + 5 = 10 ---------------- 1 + 3 + 5 = 9 ----------------10 + 9 = 19
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235 + 135 = 370 = 37 x 10
37 is ODD number no. 19
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Let us put 33 before  5.------335
If you divide 335 to 5, you'll find number that is related to  19
335 / 5 =  67 --------- is PRIME  number no 19
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17

The repetition of reciting Al-Fatihah /day is paralelel to the numbers of raka'ats /day. 17 - 17.
If you multiply 17 to 17, it will give you 289 which is the Numerical Value of "ALLAHU AKBAR".
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It's not only the numbers of the repetition is the same as Raka'ats per day, 17 it-self represent Al-Fatihah,
where 1 is the surah number, and 7 is the numbers of verses
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Please remember that:
17  is PRIME number no 7 and ODD number no 9
If you add this numbers, you will find the DHIKR number.
17 + 7 + 9  = 33
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7 is PRIME number no 4 and ODD number no 4
If you add this numbers, you will find raka'ats in Friday.
7 + 4 + 4 = 15
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7 verses repeated 17 times a day. Means, 7 x 17 = 119 ......1 -- 19
Basmalah is verse no.1 in surah Al-Fatihah. This verse has 19 Arabic letters.
Visit: http://www.harunyahya.com/miracles_of_the_quran_p4_01.php
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Surah 1 = 7 verses. Surah 7 = 206 verses. If you add all of this numbers, you will find it divisible by 17
1 + 7 + 7 + 206= 221 = 17 x 13.0000 --- and 13 is ODD number no  7
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Surah 17 has 111 verses. If you subtract 111 to 17, you'll find the repetition of ALLAHU AKBAR / day.
111 - 17  = 94
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Surah 17 also related to shalaat. Why? because surah 17 is Al-Isra (The Night Journey)
Where the Prophet Muhammad (saw) commanded by ALLAH the Almighty to perform shalaat 5 TIMES a day.
read: http://www.noblesanctuary.com/miraj.html
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Surah 17 verse 1 is the confirmation by ALLAH about the truth of the Journey
171 = 19 x 9.0000
"Glory to (Allah) Who did take His servant for a Journey by night from the Sacred Mosque to the farthest Mosque, whose precincts We did bless,- in order that We might show him some of Our Signs: for He is the One Who heareth and seeth (all things)."
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The Numerical Value of SHALAAT

 Shad = 90    Lam= 30   Alif = 1   Ta = 400
90 + 30 + 1 + 400 = 521
52117  = 19 x 2743.0000

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94

 Have you ever think that 94  is the EVEN number no 47 which is the number of surah "MUHAMMAD"?
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47 Is PRIME no 15 which is raka'ats shalaat on Friday
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Surah 15   has 99  verses which is 33(repetition) x 3 (dhikr words)
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47 -  17  = 30 which is  EVEN number no 15
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94 x 5 (times / day) = 470 which is 47 x 10
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94 + 5 (times / day) = 99 which is  33(repetition) x 3 (dhikr words)
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Beside reciting Allahu Akbar, Muslims also have to recite "Al-Fatihah" in every raka'at.
 And the first word of Al-Fatihah is Basmalah which is consists of 19 Arabic letters.

What is the relation between  94 and Basmalah?
Multiply 94 to 19
And the RESULT is : 1786
Al-Fatihah is surah no 1 in Al-Qur'an. And 786 is the TOTAL Numerical Value of Basmalah.
Visit:  http://fakir60.tripod.com/mathematical_design_of_the_basma1.htm
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That's not enough. We found 17 & 86
How many verses is surah 86  ? 17 verses
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More about 17 and 86
Isn't 86 coming from 17 it self?
7 + 1 = 8 -------7 - 1 = 6

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If you add 94 to , 17 it will give you 111
Surah 17  has 111 verses.
And how many verses is surah 111  ? 5 verses which is equal to  5 times shalaat / day.
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Again, 94 + 17 = 111
Surah 17  has 111 verses.
Please open your AL-Qur'an and find that in Surah 17 verses 111 (the last surah) you will find a word:
TAKBIR (تَكْبِيرً )
What is  TAKBIIR ? Takbiir is Saying "Allahu Akbar" (Allah is the Greatest).
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How many verses is surah 94?-- 8 verses. If you add 94 to 8, it will give you 102 which is divisible by 17
102 = 17 x 6.0000
How many verses is surah 102?-- 8 verses. If you subtract 102 to 8, it will make it back to 94.

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33
 33 is much related to raka'ats /day.
Because 33 is ODD number no. 17

Surah 33 has 73 verses. 3373 is prime 476, which is divisible by 17
476 = 17 x 28.0000
4 + 7 + 6 = 17

Let's go to the Numerical Value of the DHIKR words

195

HADITH 3
Another way for DHIKR
The Prophet (saw) says:
 

Twelveth  Fact:

HADITH 4
The 4 best words for DHIKR
The Prophet (saw) says:

The Prophet (peace be upon him) said: There are two qualities or characteristics which will not be returned by any Muslim without his entering Paradise. While they are easy, those who act upon them are few. One should say: "Glory be to Allah" (SubnahAllah) ten times after every prayer, "Praise be to Allah" (Alhamdulilah) ten times and "Allah is Most Great" (Allahu Akbar) ten times. That is a hundred and fifty on the tongue, but one thousand and five hundred on the scale
.  [Dawud 5047]