1439552

Appears in sequences

• Numbers k such that sigma(k) = 3k - 2*phi(k).at n=15A068414
• Composite numbers k such that k - phi(k) divides sigma(k) - k.at n=27A068418
• Composite n such that n reduced mod(phi(n)) = sigma(n) reduced mod(n).at n=26A068495