312879999 has 16 divisors (see below), whose sum is σ = 422411360. Its totient is φ = 205977600.

The previous prime is 312879991. The next prime is 312880027. The reversal of 312879999 is 999978213.

It is not a de Polignac number, because 312879999 - 2³ = 312879991 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 (312879991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173997 + ... + 175785.

It is an arithmetic number, because the mean of its divisors is an integer number (26400710).

Almost surely, 2^312879999 is an apocalyptic number.

312879999 is a deficient number, since it is larger than the sum of its proper divisors (109531361).

312879999 is a wasteful number, since it uses less digits than its factorization.

312879999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490.

The product of its digits is 2204496, while the sum is 57.

The square root of 312879999 is about 17688.4142590567. The cubic root of 312879999 is about 678.8793529945.

The spelling of 312879999 in words is "three hundred twelve million, eight hundred seventy-nine thousand, nine hundred ninety-nine".