312431369 has 2 divisors, whose sum is σ = 312431370. Its totient is φ = 312431368.

The previous prime is 312431359. The next prime is 312431381. The reversal of 312431369 is 963134213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242206969 + 70224400 = 15563^2 + 8380^2 .

It is an emirp because it is prime and its reverse (963134213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312431369 - 2²⁰ = 311382793 is a prime.

It is a super-2 number, since 2×312431369² = 195226720670428322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (312431359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156215684 + 156215685.

It is an arithmetic number, because the mean of its divisors is an integer number (156215685).

Almost surely, 2^312431369 is an apocalyptic number.

It is an amenable number.

312431369 is a deficient number, since it is larger than the sum of its proper divisors (1).

312431369 is an equidigital number, since it uses as much as digits as its factorization.

312431369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The square root of 312431369 is about 17675.7282452520. The cubic root of 312431369 is about 678.5547223261.

The spelling of 312431369 in words is "three hundred twelve million, four hundred thirty-one thousand, three hundred sixty-nine".