318080813 has 2 divisors, whose sum is σ = 318080814. Its totient is φ = 318080812.

The previous prime is 318080809. The next prime is 318080831.

318080813 is nontrivially palindromic in base 10.

Together with next prime (318080831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172081924 + 145998889 = 13118^2 + 12083^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 318080813 - 2² = 318080809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318080813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318080803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159040406 + 159040407.

It is an arithmetic number, because the mean of its divisors is an integer number (159040407).

Almost surely, 2^318080813 is an apocalyptic number.

It is an amenable number.

318080813 is a deficient number, since it is larger than the sum of its proper divisors (1).

318080813 is an equidigital number, since it uses as much as digits as its factorization.

318080813 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 318080813 is about 17834.8202401931. The cubic root of 318080813 is about 682.6202343778.

The spelling of 318080813 in words is "three hundred eighteen million, eighty thousand, eight hundred thirteen".