113 (number)

Updated on Oct 02, 2024

Edit

Comment

113 114 → Factorization prime Divisors 1, 113		Cardinal one hundred thirteen Prime 30th
Ordinal 113th (one hundred and thirteenth)

The number 113 (pronounced one hundred thirteen) is used in many contexts.

Mathematics

113 is the natural number following 112 and preceding 114.

It is the 30th prime number (following 109 and preceding 127), so it can only be divided by one and itself. 113 is a Sophie Germain prime, a Chen prime and a Proth prime as it is a prime number of the form 7 × 2⁴ + 1. 113 is also an Eisenstein prime with no imaginary part and real part of the form 3 n − 1 . In base 10, this prime is a primeval number, and a permutable prime with 131 and 311.

113 is a highly cototient number and a centered square number.

355/113 approximates pi to six decimal places, with an error of less than 1/113³. This means that 113/355 approximates the reciprocal of pi.

Religion

113, the number of surat al-Falaq in the Qur'an

Psalms 113–118 constitute the Hallel, which is recited on the three great feasts: Passover, Weeks, and Tabernacles

Science

113, the atomic number of the element Nihonium

Cadmium-113m, a radioisotope and nuclear isomer with a halflife of 14.1 years

Telephony

113 is:

The fire emergency telephone number in Indonesia

The intelligence agency telephone number in Iran

The medical emergency telephone number in Latvia and Norway

The police emergency telephone number in Italy, Luxembourg, Slovenia, and Vietnam

The time telephone number in Argentina

Other uses

113 (band), a French hip hop group

113, the port number of the IDENT Internet protocol that helps identify the user of a particular TCP connection

113, in enduro, is regarded as an unlucky number to be given to a race entrant and is colloquially known as a "blind pew"

References

113 (number) Wikipedia

(Text) CC BY-SA