318811919 has 2 divisors, whose sum is σ = 318811920. Its totient is φ = 318811918.

The previous prime is 318811903. The next prime is 318811981. The reversal of 318811919 is 919118813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318811919 - 2⁴ = 318811903 is a prime.

It is a super-2 number, since 2×318811919² = 203282079392925122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318813919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159405959 + 159405960.

It is an arithmetic number, because the mean of its divisors is an integer number (159405960).

Almost surely, 2^318811919 is an apocalyptic number.

318811919 is a deficient number, since it is larger than the sum of its proper divisors (1).

318811919 is an equidigital number, since it uses as much as digits as its factorization.

318811919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 41.

The square root of 318811919 is about 17855.3050660021. The cubic root of 318811919 is about 683.1428330892.

The spelling of 318811919 in words is "three hundred eighteen million, eight hundred eleven thousand, nine hundred nineteen".