232901

Properties

Appears in sequences

• Numbers k such that sigma(phi(k))-phi(sigma(k)) is nonzero and is divisible by (k+1), that is A065395(k)/(k+1) = (phi(sigma(k))-sigma(phi(k)))/(k+1) is a nonzero integer.at n=17A092586
• Centered 25-gonal primes.at n=32A276264
• Prime numbersat n=20669