318889919 has 2 divisors, whose sum is σ = 318889920. Its totient is φ = 318889918.

The previous prime is 318889913. The next prime is 318889931. The reversal of 318889919 is 919988813.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318889919 - 2¹⁶ = 318824383 is a prime.

It is a super-2 number, since 2×318889919² = 203381560879653122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318889913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159444959 + 159444960.

It is an arithmetic number, because the mean of its divisors is an integer number (159444960).

Almost surely, 2^318889919 is an apocalyptic number.

318889919 is a deficient number, since it is larger than the sum of its proper divisors (1).

318889919 is an equidigital number, since it uses as much as digits as its factorization.

318889919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 56.

The square root of 318889919 is about 17857.4891572136. The cubic root of 318889919 is about 683.1985407472.

The spelling of 318889919 in words is "three hundred eighteen million, eight hundred eighty-nine thousand, nine hundred nineteen".