312431039 has 2 divisors, whose sum is σ = 312431040. Its totient is φ = 312431038.

The previous prime is 312430973. The next prime is 312431087. The reversal of 312431039 is 930134213.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (930134213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312431039 - 2¹² = 312426943 is a prime.

It is a super-2 number, since 2×312431039² = 195226308261239042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 312430999 and 312431017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312431089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156215519 + 156215520.

It is an arithmetic number, because the mean of its divisors is an integer number (156215520).

Almost surely, 2^312431039 is an apocalyptic number.

312431039 is a deficient number, since it is larger than the sum of its proper divisors (1).

312431039 is an equidigital number, since it uses as much as digits as its factorization.

312431039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 312431039 is about 17675.7189104149. The cubic root of 312431039 is about 678.5544834223.

The spelling of 312431039 in words is "three hundred twelve million, four hundred thirty-one thousand, thirty-nine".