320080391 has 2 divisors, whose sum is σ = 320080392. Its totient is φ = 320080390.

The previous prime is 320080367. The next prime is 320080421. The reversal of 320080391 is 193080023.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320080391 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320080391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320080591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160040195 + 160040196.

It is an arithmetic number, because the mean of its divisors is an integer number (160040196).

Almost surely, 2^320080391 is an apocalyptic number.

320080391 is a deficient number, since it is larger than the sum of its proper divisors (1).

320080391 is an equidigital number, since it uses as much as digits as its factorization.

320080391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 320080391 is about 17890.7906756521. The cubic root of 320080391 is about 684.0476516567.

The spelling of 320080391 in words is "three hundred twenty million, eighty thousand, three hundred ninety-one".