397132875 has 80 divisors (see below), whose sum is σ = 753680928. Its totient is φ = 208008000.

The previous prime is 397132871. The next prime is 397132933. The reversal of 397132875 is 578231793.

It is a happy number.

It is not a de Polignac number, because 397132875 - 2² = 397132871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 397132875.

It is not an unprimeable number, because it can be changed into a prime (397132871) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 617304 + ... + 617946.

Almost surely, 2^397132875 is an apocalyptic number.

397132875 is a deficient number, since it is larger than the sum of its proper divisors (356548053).

397132875 is an equidigital number, since it uses as much as digits as its factorization.

397132875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 712 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 397132875 is about 19928.1929687566. The cubic root of 397132875 is about 735.0416469529.

The spelling of 397132875 in words is "three hundred ninety-seven million, one hundred thirty-two thousand, eight hundred seventy-five".