312330139 has 4 divisors (see below), whose sum is σ = 340723800. Its totient is φ = 283936480.

The previous prime is 312330127. The next prime is 312330157. The reversal of 312330139 is 931033213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931033213 = 11 ⋅84639383.

It is a cyclic number.

It is not a de Polignac number, because 312330139 - 2⁵ = 312330107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312336139) 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, 14196814 + ... + 14196835.

It is an arithmetic number, because the mean of its divisors is an integer number (85180950).

Almost surely, 2^312330139 is an apocalyptic number.

312330139 is a deficient number, since it is larger than the sum of its proper divisors (28393661).

312330139 is a wasteful number, since it uses less digits than its factorization.

312330139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28393660.

The product of its (nonzero) digits is 1458, while the sum is 25.

The square root of 312330139 is about 17672.8644820244. The cubic root of 312330139 is about 678.4814288805.

The spelling of 312330139 in words is "three hundred twelve million, three hundred thirty thousand, one hundred thirty-nine".