320994239 has 2 divisors, whose sum is σ = 320994240. Its totient is φ = 320994238.

The previous prime is 320994199. The next prime is 320994251. The reversal of 320994239 is 932499023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320994239 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 320994196 and 320994205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320994259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160497119 + 160497120.

It is an arithmetic number, because the mean of its divisors is an integer number (160497120).

Almost surely, 2^320994239 is an apocalyptic number.

320994239 is a deficient number, since it is larger than the sum of its proper divisors (1).

320994239 is an equidigital number, since it uses as much as digits as its factorization.

320994239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 320994239 is about 17916.3120926155. The cubic root of 320994239 is about 684.6980316071.

The spelling of 320994239 in words is "three hundred twenty million, nine hundred ninety-four thousand, two hundred thirty-nine".