979801

Appears in sequences

• Smallest solution m to (n+1)*phi(m) = n*sigma(m), or -1 if no solution exists.at n=15A065824
• a(n) = A065824(A047845(n+1)).at n=5A065884
• a(n) is the smallest k such that (n+1)*phi(k) = (n-1)*psi(k).at n=31A291932