318008813 has 2 divisors, whose sum is σ = 318008814. Its totient is φ = 318008812.

The previous prime is 318008807. The next prime is 318008893. The reversal of 318008813 is 318800813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181656484 + 136352329 = 13478^2 + 11677^2 .

It is a cyclic number.

It is not a de Polignac number, because 318008813 - 2¹⁶ = 317943277 is a prime.

It is a super-2 number, since 2×318008813² = 202259210291337938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 318008813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318008893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159004406 + 159004407.

It is an arithmetic number, because the mean of its divisors is an integer number (159004407).

Almost surely, 2^318008813 is an apocalyptic number.

It is an amenable number.

318008813 is a deficient number, since it is larger than the sum of its proper divisors (1).

318008813 is an equidigital number, since it uses as much as digits as its factorization.

318008813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 318008813 is about 17832.8016026647. The cubic root of 318008813 is about 682.5687250719.

The spelling of 318008813 in words is "three hundred eighteen million, eight thousand, eight hundred thirteen".