320420239 has 2 divisors, whose sum is σ = 320420240. Its totient is φ = 320420238.

The previous prime is 320420213. The next prime is 320420249. The reversal of 320420239 is 932024023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320420239 - 2¹⁵ = 320387471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320420249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160210119 + 160210120.

It is an arithmetic number, because the mean of its divisors is an integer number (160210120).

Almost surely, 2^320420239 is an apocalyptic number.

320420239 is a deficient number, since it is larger than the sum of its proper divisors (1).

320420239 is an equidigital number, since it uses as much as digits as its factorization.

320420239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 320420239 is about 17900.2860033017. The cubic root of 320420239 is about 684.2896637729.

The spelling of 320420239 in words is "three hundred twenty million, four hundred twenty thousand, two hundred thirty-nine".