318938497 has 2 divisors, whose sum is σ = 318938498. Its totient is φ = 318938496.

The previous prime is 318938423. The next prime is 318938551. The reversal of 318938497 is 794839813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318836736 + 101761 = 17856^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 318938497 - 2⁷ = 318938369 is a prime.

It is not a weakly prime, because it can be changed into another prime (318938407) 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, 159469248 + 159469249.

It is an arithmetic number, because the mean of its divisors is an integer number (159469249).

Almost surely, 2^318938497 is an apocalyptic number.

It is an amenable number.

318938497 is a deficient number, since it is larger than the sum of its proper divisors (1).

318938497 is an equidigital number, since it uses as much as digits as its factorization.

318938497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 318938497 is about 17858.8492630404. The cubic root of 318938497 is about 683.2332306005.

The spelling of 318938497 in words is "three hundred eighteen million, nine hundred thirty-eight thousand, four hundred ninety-seven".