318969919 has 2 divisors, whose sum is σ = 318969920. Its totient is φ = 318969918.

The previous prime is 318969907. The next prime is 318969941. The reversal of 318969919 is 919969813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318969919 - 2⁵ = 318969887 is a prime.

It is a super-2 number, since 2×318969919² = 203483618453733122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318969919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318969979) 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, 159484959 + 159484960.

It is an arithmetic number, because the mean of its divisors is an integer number (159484960).

Almost surely, 2^318969919 is an apocalyptic number.

318969919 is a deficient number, since it is larger than the sum of its proper divisors (1).

318969919 is an equidigital number, since it uses as much as digits as its factorization.

318969919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 55.

The square root of 318969919 is about 17859.7289733075. The cubic root of 318969919 is about 683.2556673710.

The spelling of 318969919 in words is "three hundred eighteen million, nine hundred sixty-nine thousand, nine hundred nineteen".