312279 has 8 divisors (see below), whose sum is σ = 454272. Its totient is φ = 189240.

The previous prime is 312269. The next prime is 312281. The reversal of 312279 is 972213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312279 - 2⁸ = 312023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4699 + ... + 4764.

It is an arithmetic number, because the mean of its divisors is an integer number (56784).

2³¹²²⁷⁹ is an apocalyptic number.

312279 is a deficient number, since it is larger than the sum of its proper divisors (141993).

312279 is a wasteful number, since it uses less digits than its factorization.

312279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9477.

The product of its digits is 756, while the sum is 24.

The square root of 312279 is about 558.8192910056. The cubic root of 312279 is about 67.8444396746.

The spelling of 312279 in words is "three hundred twelve thousand, two hundred seventy-nine".