319499917 has 4 divisors (see below), whose sum is σ = 348545376. Its totient is φ = 290454460.

The previous prime is 319499911. The next prime is 319499987. The reversal of 319499917 is 719994913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 319499917 - 2²³ = 311111309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319499911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14522713 + ... + 14522734.

It is an arithmetic number, because the mean of its divisors is an integer number (87136344).

Almost surely, 2^319499917 is an apocalyptic number.

It is an amenable number.

319499917 is a deficient number, since it is larger than the sum of its proper divisors (29045459).

319499917 is a wasteful number, since it uses less digits than its factorization.

319499917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29045458.

The product of its digits is 551124, while the sum is 52.

The square root of 319499917 is about 17874.5606099842. The cubic root of 319499917 is about 683.6338887779.

The spelling of 319499917 in words is "three hundred nineteen million, four hundred ninety-nine thousand, nine hundred seventeen".