172122939 has 12 divisors (see below), whose sum is σ = 248736072. Its totient is φ = 114696000.

The previous prime is 172122913. The next prime is 172122941. The reversal of 172122939 is 939221271.

It is not a de Polignac number, because 172122939 - 2⁹ = 172122427 is a prime.

It is a super-2 number, since 2×172122939² = 59252612259995442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172122949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34099 + ... + 38819.

It is an arithmetic number, because the mean of its divisors is an integer number (20728006).

Almost surely, 2^172122939 is an apocalyptic number.

172122939 is a deficient number, since it is larger than the sum of its proper divisors (76613133).

172122939 is a wasteful number, since it uses less digits than its factorization.

172122939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8778 (or 8775 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 172122939 is about 13119.5632168148. The cubic root of 172122939 is about 556.2622451708.

The spelling of 172122939 in words is "one hundred seventy-two million, one hundred twenty-two thousand, nine hundred thirty-nine".