312715807 has 2 divisors, whose sum is σ = 312715808. Its totient is φ = 312715806.

The previous prime is 312715763. The next prime is 312715811. The reversal of 312715807 is 708517213.

It is a strong prime.

It is an emirp because it is prime and its reverse (708517213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312715807 is a prime.

It is a super-2 number, since 2×312715807² = 195582351895322498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312715607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156357903 + 156357904.

It is an arithmetic number, because the mean of its divisors is an integer number (156357904).

Almost surely, 2^312715807 is an apocalyptic number.

312715807 is a deficient number, since it is larger than the sum of its proper divisors (1).

312715807 is an equidigital number, since it uses as much as digits as its factorization.

312715807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 312715807 is about 17683.7724199335. The cubic root of 312715807 is about 678.7605789564.

The spelling of 312715807 in words is "three hundred twelve million, seven hundred fifteen thousand, eight hundred seven".