312839 has 2 divisors, whose sum is σ = 312840. Its totient is φ = 312838.

The previous prime is 312799. The next prime is 312841. The reversal of 312839 is 938213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312839 - 2⁸ = 312583 is a prime.

Together with 312841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156419 + 156420.

It is an arithmetic number, because the mean of its divisors is an integer number (156420).

2³¹²⁸³⁹ is an apocalyptic number.

312839 is a deficient number, since it is larger than the sum of its proper divisors (1).

312839 is an equidigital number, since it uses as much as digits as its factorization.

312839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 312839 is about 559.3201230065. The cubic root of 312839 is about 67.8849698824.

The spelling of 312839 in words is "three hundred twelve thousand, eight hundred thirty-nine".