320939 has 2 divisors, whose sum is σ = 320940. Its totient is φ = 320938.

The previous prime is 320927. The next prime is 320941. The reversal of 320939 is 939023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320939 - 2⁴ = 320923 is a prime.

Together with 320941, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320939.

It is not a weakly prime, because it can be changed into another prime (320039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160469 + 160470.

It is an arithmetic number, because the mean of its divisors is an integer number (160470).

2³²⁰⁹³⁹ is an apocalyptic number.

320939 is a deficient number, since it is larger than the sum of its proper divisors (1).

320939 is an equidigital number, since it uses as much as digits as its factorization.

320939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 320939 is about 566.5147835670. The cubic root of 320939 is about 68.4658753431.

The spelling of 320939 in words is "three hundred twenty thousand, nine hundred thirty-nine".