319978939 has 4 divisors (see below), whose sum is σ = 365690224. Its totient is φ = 274267656.

The previous prime is 319978907. The next prime is 319979063. The reversal of 319978939 is 939879913.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 319978939 - 2⁵ = 319978907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319973939) 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 in 3 ways as a sum of consecutive naturals, for example, 22855632 + ... + 22855645.

It is an arithmetic number, because the mean of its divisors is an integer number (91422556).

Almost surely, 2^319978939 is an apocalyptic number.

319978939 is a deficient number, since it is larger than the sum of its proper divisors (45711285).

319978939 is an equidigital number, since it uses as much as digits as its factorization.

319978939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45711284.

The product of its digits is 3306744, while the sum is 58.

The square root of 319978939 is about 17887.9551374661. The cubic root of 319978939 is about 683.9753725900.

The spelling of 319978939 in words is "three hundred nineteen million, nine hundred seventy-eight thousand, nine hundred thirty-nine".