64005

Appears in sequences

• Odd composite numbers k such that cototient(k) - phi(k) = k - 2*phi(k) is an odd prime.at n=18A083255
• a(n) = n^3 + 5.at n=40A084381
• a(n) = (8*n+3)*(8*n+7).at n=31A146301
• Numbers k such that phi(k) = (k-5)/2.at n=1A233466
• Numbers n such that phi(n) = phi(n+11), with Euler's totient function phi = A000010.at n=36A276504