89067

Appears in sequences

• Numbers k such that sigma(phi(k)) = sigma(k) where sigma is the sum of divisors function A000203 and phi is the Euler totient function A000010.at n=20A033631
• Numbers k such that sigma(k*phi(k)) = sigma(k)^2.at n=6A082955
• Number of partitions of n into square parts.at n=44A179662