103 104 → Factorization prime Roman numeral CIII | Cardinal one hundred three Prime 27th | |

Ordinal 103rd (one hundred and third) |

**103** (**one hundred [and] three**) is the natural number following 102 and preceding 104.

## Contents

## In mathematics

103 is the 27th prime number. The previous prime is 101, making them both twin primes. It is also a happy number.

103 is a strictly non-palindromic number.

103 is the smallest prime number in which the period length of its reciprocal is exactly 1/3 of the maximum length.

## In science

## In other fields

When "and" is required for the number name, 103 is the smallest number requiring 18 letters when spelled out in English.

**One hundred three** is also:

## References

103 (number) Wikipedia(Text) CC BY-SA