178119

Appears in sequences

• Odd numbers n such that q(n)^2 = q(n^2) != 0, where q(n) is the digit product on base 10.at n=29A278316
• Deficient 2-hyperperfect numbers: numbers k such that 3*k/2 + 1/2 - sigma(k) is a proper divisor of k.at n=24A305617