320604491 has 2 divisors, whose sum is σ = 320604492. Its totient is φ = 320604490.

The previous prime is 320604457. The next prime is 320604587. The reversal of 320604491 is 194406023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320604491 - 2²² = 316410187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320604451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160302245 + 160302246.

It is an arithmetic number, because the mean of its divisors is an integer number (160302246).

Almost surely, 2^320604491 is an apocalyptic number.

320604491 is a deficient number, since it is larger than the sum of its proper divisors (1).

320604491 is an equidigital number, since it uses as much as digits as its factorization.

320604491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 320604491 is about 17905.4318853246. The cubic root of 320604491 is about 684.4208015356.

The spelling of 320604491 in words is "three hundred twenty million, six hundred four thousand, four hundred ninety-one".