Do you believe in coincidence? Mathematicians and scientists have been investigating the number 23 for many years, and there are some weird thing about the number. Coincidence or not, let's take a look at some interesting things about the number 23.

### Weird but true!

In many religions, which are involved in mathematics, like Kabbalism or Hurufism, there are many ‘holy numbers’ in our life. The number 23 is one of them.

In mathematics, twenty-three is the ninth prime number. It is is also the fifth factorial prime, and the second Woodall prime.

No doubt, Einstein was the one who worked with the number as an Eisenstein prime with no imaginary part and the real part having the form of 3*n* − 1.

In Islam, the Qur'an was revealed in a total of 23 years to Prophet Muhammed.^{ }Also Muslims believe that the first verses of the Qur'an were revealed to the Prophet Muhammad on the 23rd night of the 9th Islamic month.

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According to the birthday paradox, in a group of 23 (or more) randomly chosen people, the probability is more than 50% that some pair of them will have the same birthday. A related coincidence is that 365 times the natural logarithm of 2, which is approximately 252.999, is very close to the number of pairs of 23 items, 253.

Number twenty-three is also in our body and genes. Normal human sex cells have 23 chromosomes. Other human cells have 46 chromosomes, arranged in 23 pairs. The average human physical biorhythm is 23 days and the blood circulates the body on average every 23 seconds.

^{}[Image Source: *Wikipedia*]

In Christianity, Psalm 23, also known as the Shepherd Psalm, is possibly the most quoted and best known Psalm. Psalms is also the 23rd book in the Douay–Rheims Bible.

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23 is also one of the happy numbers. There are only three other numbers that have this property: 1, 22, and 24.

[Image Source: *Wikimedia*]

The Cabalists affirm that a letter is missing in the Torah. That letter of the alphabet does not appear at all in our "eon" and also is not used in the Torah. The primitive divine alphabet and all the Torah also would base on a series of 23 letters, not 22. Somehow it became invisible to us and will reappear only during a next terrestrial period.

[Image Source: *Wikimedia*]

*Principia Discordia*, the sacred text of Discordianism, holds that 23 is one of the sacred numbers of Eris, goddess of discord.

Composer Alban Berg had a particular interest in the number 23, using it to structure several works either. Various suggestions have been made as to the reason for this interest: that he took it from the Biorhythms theory of Wilhelm Fliess, in which a 23-day cycle is considered significant. Or just because he suffered an asthma attack on 23rd of the month.

[Image Source: Jim Carrey Online]

There are even two movies about number 23 called *The Number 23*. In 2007, Jim Carrey characterized a man who becomes obsessed with the 23 enigma in the movie. And the German production movie called 23 was also about a man who is obsessed about the number.

[Image Source: *Wikimedia*]

John Forbes Nash, the Nobel Prize-winning mathematician also, the subject of a film called A Beautiful Mind, was obsessed with 23 as well. He believed that the number 23 has a unique role in human relationships and the life order. Nash published 23 scientific articles and died on the May 23 2015 in a tragic accident.

[Image Source: *historyz.ga*]

According to Sun Tzu's original formulation, and Chinese remainder theorem, 23 is the smallest positive solution. And the Chinese mathematician Tzu based his theory on this in 3rd century AD.

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Written by Tamar Melike Tegün

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