312857851717 has 2 divisors, whose sum is σ = 312857851718. Its totient is φ = 312857851716.

The previous prime is 312857851703. The next prime is 312857851723. The reversal of 312857851717 is 717158758213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258664805281 + 54193046436 = 508591^2 + 232794^2 .

It is an emirp because it is prime and its reverse (717158758213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312857851717 - 2⁷ = 312857851589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312857854717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156428925858 + 156428925859.

It is an arithmetic number, because the mean of its divisors is an integer number (156428925859).

Almost surely, 2^312857851717 is an apocalyptic number.

It is an amenable number.

312857851717 is a deficient number, since it is larger than the sum of its proper divisors (1).

312857851717 is an equidigital number, since it uses as much as digits as its factorization.

312857851717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3292800, while the sum is 55.

The spelling of 312857851717 in words is "three hundred twelve billion, eight hundred fifty-seven million, eight hundred fifty-one thousand, seven hundred seventeen".