319345139 has 2 divisors, whose sum is σ = 319345140. Its totient is φ = 319345138.

The previous prime is 319345123. The next prime is 319345171. The reversal of 319345139 is 931543913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 319345139 - 2⁴ = 319345123 is a prime.

It is not a weakly prime, because it can be changed into another prime (319345339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159672569 + 159672570.

It is an arithmetic number, because the mean of its divisors is an integer number (159672570).

Almost surely, 2^319345139 is an apocalyptic number.

319345139 is a deficient number, since it is larger than the sum of its proper divisors (1).

319345139 is an equidigital number, since it uses as much as digits as its factorization.

319345139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 38.

The square root of 319345139 is about 17870.2305245344. The cubic root of 319345139 is about 683.5234781316.

It can be divided in two parts, 31934 and 5139, that added together give a palindrome (37073).

The spelling of 319345139 in words is "three hundred nineteen million, three hundred forty-five thousand, one hundred thirty-nine".