312974681 has 2 divisors, whose sum is σ = 312974682. Its totient is φ = 312974680.

The previous prime is 312974677. The next prime is 312974723. The reversal of 312974681 is 186479213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237006025 + 75968656 = 15395^2 + 8716^2 .

It is an emirp because it is prime and its reverse (186479213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312974681 - 2² = 312974677 is a prime.

It is a super-2 number, since 2×312974681² = 195906301894103522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312974611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156487340 + 156487341.

It is an arithmetic number, because the mean of its divisors is an integer number (156487341).

Almost surely, 2^312974681 is an apocalyptic number.

It is an amenable number.

312974681 is a deficient number, since it is larger than the sum of its proper divisors (1).

312974681 is an equidigital number, since it uses as much as digits as its factorization.

312974681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 312974681 is about 17691.0904412362. The cubic root of 312974681 is about 678.9478256490.

The spelling of 312974681 in words is "three hundred twelve million, nine hundred seventy-four thousand, six hundred eighty-one".