479655

Appears in sequences

• Numbers k such that sigma(k) = phi(k)*omega(k).at n=24A073567
• Numbers k such that phi(k) = Sum_{d|k} core(d) where core(x) is the squarefree part of x (A007913).at n=32A074786
• n = k^2 - (reversal of k)^2 for two different values of k.at n=31A087672
• Numbers n such that sigma(n) = 5*phi(n).at n=25A136547