172716506 has 16 divisors (see below), whose sum is σ = 265097448. Its totient is φ = 84364800.

The previous prime is 172716503. The next prime is 172716521. The reversal of 172716506 is 605617271.

It can be written as a sum of positive squares in 4 ways, for example, as 172685881 + 30625 = 13141^2 + 175^2 .

It is not an unprimeable number, because it can be changed into a prime (172716503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22166 + ... + 28926.

Almost surely, 2^172716506 is an apocalyptic number.

172716506 is a deficient number, since it is larger than the sum of its proper divisors (92380942).

172716506 is a wasteful number, since it uses less digits than its factorization.

172716506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7057.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 172716506 is about 13142.1651945180. The cubic root of 172716506 is about 556.9009361323.

The spelling of 172716506 in words is "one hundred seventy-two million, seven hundred sixteen thousand, five hundred six".