109

This number is a prime.

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

The smallest prime number which is sum of primeval primes. [Capelle]

The smallest invertible prime whose reversal is an invertible semiprime. [Capelle]

The smallest invertible Cyclops prime. It yields the smallest invertible Cyclops semiprime when reversed-then-turned upside down. [Capelle]

The smallest number (coincidentally prime) that has more distinct digits than its square. [Capelle]