401311

Properties

Appears in sequences

• Numbers k such that Sum_{i=1..k} i^sigma(i) == 0 (mod k).at n=9A227427
• The greater of twin primes p2 such that 2*p1 + p2 is a prime number (A174913) and also the lesser of other twin primes in A174913.at n=14A242773
• Prime numbersat n=33953