172924939 has 16 divisors (see below), whose sum is σ = 196116480. Its totient is φ = 151083360.

The previous prime is 172924937. The next prime is 172924967. The reversal of 172924939 is 939429271.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 172924939 - 2¹ = 172924937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172924931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31222 + ... + 36340.

It is an arithmetic number, because the mean of its divisors is an integer number (12257280).

Almost surely, 2^172924939 is an apocalyptic number.

172924939 is a deficient number, since it is larger than the sum of its proper divisors (23191541).

172924939 is a wasteful number, since it uses less digits than its factorization.

172924939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250.

The product of its digits is 244944, while the sum is 46.

The square root of 172924939 is about 13150.0927373156. The cubic root of 172924939 is about 557.1248673851.

The spelling of 172924939 in words is "one hundred seventy-two million, nine hundred twenty-four thousand, nine hundred thirty-nine".