312412391 has 2 divisors, whose sum is σ = 312412392. Its totient is φ = 312412390.

The previous prime is 312412367. The next prime is 312412403. The reversal of 312412391 is 193214213.

It is a strong prime.

It is an emirp because it is prime and its reverse (193214213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312412391 - 2²² = 308218087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312412391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312412301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156206195 + 156206196.

It is an arithmetic number, because the mean of its divisors is an integer number (156206196).

Almost surely, 2^312412391 is an apocalyptic number.

312412391 is a deficient number, since it is larger than the sum of its proper divisors (1).

312412391 is an equidigital number, since it uses as much as digits as its factorization.

312412391 is an odious number, because the sum of its binary digits is odd.

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

The square root of 312412391 is about 17675.1913992466. The cubic root of 312412391 is about 678.5409829115.

The spelling of 312412391 in words is "three hundred twelve million, four hundred twelve thousand, three hundred ninety-one".