103 (number)
103 is the natural number following 102 and preceding 104.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.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:
