310139 has 4 divisors (see below), whose sum is σ = 311256. Its totient is φ = 309024.

The previous prime is 310129. The next prime is 310169. The reversal of 310139 is 931013.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 310139 - 2¹⁶ = 244603 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 310139.

It is not an unprimeable number, because it can be changed into a prime (310129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227 + ... + 819.

It is an arithmetic number, because the mean of its divisors is an integer number (77814).

2³¹⁰¹³⁹ is an apocalyptic number.

310139 is a deficient number, since it is larger than the sum of its proper divisors (1117).

310139 is an equidigital number, since it uses as much as digits as its factorization.

310139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 310139 is about 556.9012479785. The cubic root of 310139 is about 67.6891084722.

The spelling of 310139 in words is "three hundred ten thousand, one hundred thirty-nine".