997

This number is a prime.

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

The sum of digits of the largest 3-digit prime (997) provides the number of primes less than or equal to the largest 2-digit prime. This is not true for any other tier of n-digit numbers. [Green]

Submitted: 2010-01-18 18:16:02; Last Modified: 2019-01-31 22:07:21.