312857117 has 4 divisors (see below), whose sum is σ = 318159840. Its totient is φ = 307554396.

The previous prime is 312857099. The next prime is 312857123. The reversal of 312857117 is 711758213.

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 a de Polignac number, because none of the positive numbers 2^k-312857117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312857717) 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, 2651273 + ... + 2651390.

It is an arithmetic number, because the mean of its divisors is an integer number (79539960).

Almost surely, 2^312857117 is an apocalyptic number.

It is an amenable number.

312857117 is a deficient number, since it is larger than the sum of its proper divisors (5302723).

312857117 is an equidigital number, since it uses as much as digits as its factorization.

312857117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302722.

The product of its digits is 11760, while the sum is 35.

The square root of 312857117 is about 17687.7674396742. The cubic root of 312857117 is about 678.8628029901.

The spelling of 312857117 in words is "three hundred twelve million, eight hundred fifty-seven thousand, one hundred seventeen".