57

This number is a composite.

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

The smallest double-digit odd number that creates two primes (5657 and 5857) by concatenation with its previous and next even numbers. [Loungrides]

Submitted: 2020-12-27 08:40:53; Last Modified: 2022-02-10 19:50:49.