19

This number is a prime.

Single Curio View: (Seek other curios for this number)

19 is the smallest prime p such that p and p² have the same sum of digits.

Submitted: 1999-09-02 23:40:00; Last Modified: 2022-02-12 22:46:40.

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell