312977 has 4 divisors (see below), whose sum is σ = 357696. Its totient is φ = 268260.

The previous prime is 312971. The next prime is 312979. The reversal of 312977 is 779213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312977 - 2¹⁸ = 50833 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312977.

It is not an unprimeable number, because it can be changed into a prime (312971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22349 + ... + 22362.

It is an arithmetic number, because the mean of its divisors is an integer number (89424).

2³¹²⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

312977 is a deficient number, since it is larger than the sum of its proper divisors (44719).

312977 is an equidigital number, since it uses as much as digits as its factorization.

312977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44718.

The product of its digits is 2646, while the sum is 29.

The square root of 312977 is about 559.4434734627. The cubic root of 312977 is about 67.8949502543.

The spelling of 312977 in words is "three hundred twelve thousand, nine hundred seventy-seven".