318484813 has 2 divisors, whose sum is σ = 318484814. Its totient is φ = 318484812.

The previous prime is 318484807. The next prime is 318484849.

318484813 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197880489 + 120604324 = 14067^2 + 10982^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 318484813 - 2²¹ = 316387661 is a prime.

It is a super-2 number, since 2×318484813² = 202865152223289938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318484513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159242406 + 159242407.

It is an arithmetic number, because the mean of its divisors is an integer number (159242407).

Almost surely, 2^318484813 is an apocalyptic number.

It is an amenable number.

318484813 is a deficient number, since it is larger than the sum of its proper divisors (1).

318484813 is an equidigital number, since it uses as much as digits as its factorization.

318484813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 40.

The square root of 318484813 is about 17846.1428045390. The cubic root of 318484813 is about 682.9091147385.

The spelling of 318484813 in words is "three hundred eighteen million, four hundred eighty-four thousand, eight hundred thirteen".