397506957 has 8 divisors (see below), whose sum is σ = 530768160. Its totient is φ = 264625200.

The previous prime is 397506917. The next prime is 397506979. The reversal of 397506957 is 759605793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397506957 - 2⁷ = 397506829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397506917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92407 + ... + 96612.

It is an arithmetic number, because the mean of its divisors is an integer number (66346020).

Almost surely, 2^397506957 is an apocalyptic number.

It is an amenable number.

397506957 is a deficient number, since it is larger than the sum of its proper divisors (133261203).

397506957 is a wasteful number, since it uses less digits than its factorization.

397506957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189723.

The product of its (nonzero) digits is 1786050, while the sum is 51.

The square root of 397506957 is about 19937.5765076902. The cubic root of 397506957 is about 735.2723670104.

The spelling of 397506957 in words is "three hundred ninety-seven million, five hundred six thousand, nine hundred fifty-seven".