312979873 has 2 divisors, whose sum is σ = 312979874. Its totient is φ = 312979872.

The previous prime is 312979871. The next prime is 312979897. The reversal of 312979873 is 378979213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303038464 + 9941409 = 17408^2 + 3153^2 .

It is an emirp because it is prime and its reverse (378979213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312979873 - 2¹ = 312979871 is a prime.

It is a super-2 number, since 2×312979873² = 195912801806192258, which contains 22 as substring.

Together with 312979871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312979871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156489936 + 156489937.

It is an arithmetic number, because the mean of its divisors is an integer number (156489937).

Almost surely, 2^312979873 is an apocalyptic number.

It is an amenable number.

312979873 is a deficient number, since it is larger than the sum of its proper divisors (1).

312979873 is an equidigital number, since it uses as much as digits as its factorization.

312979873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 312979873 is about 17691.2371811584. The cubic root of 312979873 is about 678.9515800289.

The spelling of 312979873 in words is "three hundred twelve million, nine hundred seventy-nine thousand, eight hundred seventy-three".