320957 has 8 divisors (see below), whose sum is σ = 395136. Its totient is φ = 253872.

The previous prime is 320953. The next prime is 321007. The reversal of 320957 is 759023.

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

It is a cyclic number.

It is not a de Polignac number, because 320957 - 2² = 320953 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320957.

It is not an unprimeable number, because it can be changed into a prime (320953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1673 + ... + 1854.

It is an arithmetic number, because the mean of its divisors is an integer number (49392).

2³²⁰⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

320957 is a deficient number, since it is larger than the sum of its proper divisors (74179).

320957 is a wasteful number, since it uses less digits than its factorization.

320957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 320957 is about 566.5306699553. The cubic root of 320957 is about 68.4671552984.

The spelling of 320957 in words is "three hundred twenty thousand, nine hundred fifty-seven".