191

This number is a prime.

Just showing those entries submitted by 'Gaydos': (Click here to show all)

The smallest prime number in the smallest prime decade in which the product of the four prime numbers is a reverse prime. [Gaydos]

The smallest prime number that falls between two happy numbers. [Gaydos]

191 lucky numbers each have the same number of digits as its lucky index. [Gaydos]