319102139 has 4 divisors (see below), whose sum is σ = 326885160. Its totient is φ = 311319120.

The previous prime is 319102123. The next prime is 319102159. The reversal of 319102139 is 931201913.

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 319102139 - 2⁴ = 319102123 is a prime.

It is a super-2 number, since 2×319102139² = 203652350228750642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319102159) 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, 3891449 + ... + 3891530.

It is an arithmetic number, because the mean of its divisors is an integer number (81721290).

Almost surely, 2^319102139 is an apocalyptic number.

319102139 is a deficient number, since it is larger than the sum of its proper divisors (7783021).

319102139 is an equidigital number, since it uses as much as digits as its factorization.

319102139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7783020.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 319102139 is about 17863.4302137076. The cubic root of 319102139 is about 683.3500624631.

The spelling of 319102139 in words is "three hundred nineteen million, one hundred two thousand, one hundred thirty-nine".