484662529

Appears in sequences

• Composite numbers k such that phi(k)*lambda(k) divides (k-1)^2, where phi(k) = A000010(k) and lambda(k) = A002322(k).at n=7A277366
• Carmichael numbers k for which A053575(k) [the odd part of phi] divides k-1.at n=32A339869