320959 has 4 divisors (see below), whose sum is σ = 322816. Its totient is φ = 319104.

The previous prime is 320953. The next prime is 321007. The reversal of 320959 is 959023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 959023 = 13 ⋅73771.

It is a cyclic number.

It is not a de Polignac number, because 320959 - 2⁵ = 320927 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 (320953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639 + ... + 1024.

It is an arithmetic number, because the mean of its divisors is an integer number (80704).

2³²⁰⁹⁵⁹ is an apocalyptic number.

320959 is a deficient number, since it is larger than the sum of its proper divisors (1857).

320959 is a wasteful number, since it uses less digits than its factorization.

320959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 320959 is about 566.5324350821. The cubic root of 320959 is about 68.4672975127.

The spelling of 320959 in words is "three hundred twenty thousand, nine hundred fifty-nine".