172943975 has 24 divisors (see below), whose sum is σ = 227797920. Its totient is φ = 129797120.

The previous prime is 172943971. The next prime is 172943977. The reversal of 172943975 is 579349271.

It is not a de Polignac number, because 172943975 - 2² = 172943971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172943971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213371 + ... + 214179.

It is an arithmetic number, because the mean of its divisors is an integer number (9491580).

Almost surely, 2^172943975 is an apocalyptic number.

172943975 is a deficient number, since it is larger than the sum of its proper divisors (54853945).

172943975 is a wasteful number, since it uses less digits than its factorization.

172943975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339 (or 1334 counting only the distinct ones).

The product of its digits is 476280, while the sum is 47.

The square root of 172943975 is about 13150.8165145743. The cubic root of 172943975 is about 557.1453098574.

The spelling of 172943975 in words is "one hundred seventy-two million, nine hundred forty-three thousand, nine hundred seventy-five".