Sinnema
Hi, I’m Rémon Sinnema, a software developer from the Netherlands. Check out my personal home page or LinkedIn profile for more information. You can also follow me on Twitter.
The opinions expressed here are my personal opinions. Content published here is not read or approved in advance by EMC and does not necessarily reflect the views and opinions of EMC.
313
The number 313 is a prime number. But it’s not just any prime: all its digits (3, 1, 3) are primes, as are its other substrings (31 and 13), making it both left and right truncatable prime. Also, the sum of its digits (7) is prime. Furthermore, 313 is a palindromic prime, a centered square prime, a long prime, a Pythagorean prime, and a fortunate prime. But most importantly, 313 is a happy prime. 
