320604457 has 2 divisors, whose sum is σ = 320604458. Its totient is φ = 320604456.

The previous prime is 320604451. The next prime is 320604491. The reversal of 320604457 is 754406023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289646361 + 30958096 = 17019^2 + 5564^2 .

It is a cyclic number.

It is not a de Polignac number, because 320604457 - 2⁷ = 320604329 is a prime.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160302228 + 160302229.

It is an arithmetic number, because the mean of its divisors is an integer number (160302229).

Almost surely, 2^320604457 is an apocalyptic number.

It is an amenable number.

320604457 is a deficient number, since it is larger than the sum of its proper divisors (1).

320604457 is an equidigital number, since it uses as much as digits as its factorization.

320604457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 320604457 is about 17905.4309358920. The cubic root of 320604457 is about 684.4207773414.

The spelling of 320604457 in words is "three hundred twenty million, six hundred four thousand, four hundred fifty-seven".