113 number

113 is the natural number following 112 and preceding 114.

Template:Numbers 110s
Cardinal	one hundred [and] thirteen
Ordinal	113th
Factorization	$prime$
Roman numeral	CXIII
Binary	1110001
Hexadecimal	71

One hundred thirteen is the 30th prime number, following 109 and preceding 127, a Sophie Germain prime, a Chen prime, a primeval number, and a permutable prime with 131 and 311. 113 is an Eisenstein prime with no imaginary part and real part of the form $3n-1$.

In mathematics

It is a highly cototient number and a centered square number. 355/113 approximates pi to seven decimal places, with an error of less that 1/113³.

In other fields

• The atomic number of an element temporarily called ununtrium.
• Part of an in-joke on some Disney movies. See A113.
• The number of surat al-Falaq in the Qur'an.
• The year AD 113 or 113 BC.