172957 has 4 divisors (see below), whose sum is σ = 182080. Its totient is φ = 163836.

The previous prime is 172933. The next prime is 172969. The reversal of 172957 is 759271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172957 - 2⁷ = 172829 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4533 + ... + 4570.

It is an arithmetic number, because the mean of its divisors is an integer number (45520).

2¹⁷²⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

172957 is a deficient number, since it is larger than the sum of its proper divisors (9123).

172957 is an equidigital number, since it uses as much as digits as its factorization.

172957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9122.

The product of its digits is 4410, while the sum is 31.

The square root of 172957 is about 415.8809925928. The cubic root of 172957 is about 55.7159296343.

The spelling of 172957 in words is "one hundred seventy-two thousand, nine hundred fifty-seven".