312823 has 16 divisors (see below), whose sum is σ = 391680. Its totient is φ = 243936.

The previous prime is 312799. The next prime is 312839. The reversal of 312823 is 328213.

312823 = T₁₆₂ + T₁₆₃ + ... + T₁₈₂.

It is a happy number.

It is not a de Polignac number, because 312823 - 2⁹ = 312311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4636 + ... + 4702.

It is an arithmetic number, because the mean of its divisors is an integer number (24480).

2³¹²⁸²³ is an apocalyptic number.

312823 is a deficient number, since it is larger than the sum of its proper divisors (78857).

312823 is a wasteful number, since it uses less digits than its factorization.

312823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126.

The product of its digits is 288, while the sum is 19.

The square root of 312823 is about 559.3058197444. The cubic root of 312823 is about 67.8838125480.

The spelling of 312823 in words is "three hundred twelve thousand, eight hundred twenty-three".