957997 has 4 divisors (see below), whose sum is σ = 980320. Its totient is φ = 935676.

The previous prime is 957991. The next prime is 958007. The reversal of 957997 is 799759.

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 a de Polignac number, because none of the positive numbers 2^k-957997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (957991) 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, 11097 + ... + 11182.

It is an arithmetic number, because the mean of its divisors is an integer number (245080).

2⁹⁵⁷⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

957997 is a deficient number, since it is larger than the sum of its proper divisors (22323).

957997 is a wasteful number, since it uses less digits than its factorization.

957997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22322.

The product of its digits is 178605, while the sum is 46.

The square root of 957997 is about 978.7732117299. The cubic root of 957997 is about 98.5798265517.

The spelling of 957997 in words is "nine hundred fifty-seven thousand, nine hundred ninety-seven".