320320387 has 2 divisors, whose sum is σ = 320320388. Its totient is φ = 320320386.

The previous prime is 320320339. The next prime is 320320513. The reversal of 320320387 is 783023023.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320320387 is a prime.

It is not a weakly prime, because it can be changed into another prime (320320327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160160193 + 160160194.

It is an arithmetic number, because the mean of its divisors is an integer number (160160194).

Almost surely, 2^320320387 is an apocalyptic number.

320320387 is a deficient number, since it is larger than the sum of its proper divisors (1).

320320387 is an equidigital number, since it uses as much as digits as its factorization.

320320387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 320320387 is about 17897.4966685288. The cubic root of 320320387 is about 684.2185750567.

The spelling of 320320387 in words is "three hundred twenty million, three hundred twenty thousand, three hundred eighty-seven".