318974729 has 2 divisors, whose sum is σ = 318974730. Its totient is φ = 318974728.

The previous prime is 318974707. The next prime is 318974749. The reversal of 318974729 is 927479813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223951225 + 95023504 = 14965^2 + 9748^2 .

It is a cyclic number.

It is not a de Polignac number, because 318974729 - 2¹² = 318970633 is a prime.

It is not a weakly prime, because it can be changed into another prime (318974749) 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, 159487364 + 159487365.

It is an arithmetic number, because the mean of its divisors is an integer number (159487365).

Almost surely, 2^318974729 is an apocalyptic number.

It is an amenable number.

318974729 is a deficient number, since it is larger than the sum of its proper divisors (1).

318974729 is an equidigital number, since it uses as much as digits as its factorization.

318974729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 318974729 is about 17859.8636332980. The cubic root of 318974729 is about 683.2591018049.

The spelling of 318974729 in words is "three hundred eighteen million, nine hundred seventy-four thousand, seven hundred twenty-nine".