As a digit, [number] is used as a placeholder in place value systems.

For example, a line segment of unit length is a line segment of length [number].

An integer is called even if it is divisible by [number].

[Number] is the only cardinal numeral in the English language that has the same number of letters as its number value.

[Number] is the third prime number.

[Number] is the smallest positive integer which is neither a square number nor a prime number.

The reason for the choice of [number] is assumed to be that humans have [number] fingers (digits).

In English, it is the smallest positive integer requiring three syllables and the largest prime number with a single-morpheme name.

It is central to many systems of counting, including the Western calendar and units of time, and frequently appears in the Abrahamic religions.

In spoken English, the numbers [number] and 70 are sometimes confused because they sound similar.

[Number] is the number of ways that three things can be selected from a set of seven unique things also known as the 'combination of seven things taken three at a time'.

It is also the sum of three squares, [number] = 3² + 4² + 5², and the sum of four squares, [number] = 6² + 3² + 2² + 1².

The previous prime is 101, making them both twin primes.

It is also the sum of six consecutive primes (11 + 13 + 17 + 19 + 23 + 29).

This 'hundred' of six score is now obsolete, but is described as the long hundred or great hundred in historical contexts.

The sum of Euler's totient function φ(x) over the first twenty-five integers is [number].

Two properties of [number] are the basis of a divisibility test for 7, 11 and 13.

In the Mayan calendar, a baktun is a period of [number] days.

The primality of this number was proven by Leonhard Euler, who reported the proof in a letter to Daniel Bernoulli written in 1772.

[Number] is the second perfect number.

## Show Comments