491537

Properties

Appears in sequences

• Primes of the form triangular(p) + 1, where p is a prime.at n=36A231988
• Primes p such that phi(p-2) = phi(p-1).at n=12A256510
• Primes p such that phi(phi(p-1)+1) = phi(phi(p-2)+1).at n=28A271659
• Primes p such that phi(phi(p-2)-1) = phi(phi(p-1)-1).at n=18A271660
• Prime numbersat n=40886