312439984757 has 2 divisors, whose sum is σ = 312439984758. Its totient is φ = 312439984756.

The previous prime is 312439984711. The next prime is 312439984763. The reversal of 312439984757 is 757489934213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310376008996 + 2063975761 = 557114^2 + 45431^2 .

It is a cyclic number.

It is not a de Polignac number, because 312439984757 - 2¹⁰ = 312439983733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312439984757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312439984777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156219992378 + 156219992379.

It is an arithmetic number, because the mean of its divisors is an integer number (156219992379).

Almost surely, 2^312439984757 is an apocalyptic number.

It is an amenable number.

312439984757 is a deficient number, since it is larger than the sum of its proper divisors (1).

312439984757 is an equidigital number, since it uses as much as digits as its factorization.

312439984757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 62.

The spelling of 312439984757 in words is "three hundred twelve billion, four hundred thirty-nine million, nine hundred eighty-four thousand, seven hundred fifty-seven".