312969 has 4 divisors (see below), whose sum is σ = 417296. Its totient is φ = 208644.

The previous prime is 312967. The next prime is 312971. The reversal of 312969 is 969213.

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 an interprime number because it is at equal distance from previous prime (312967) and next prime (312971).

It is not a de Polignac number, because 312969 - 2¹ = 312967 is a prime.

It is a super-2 number, since 2×312969² = 195899189922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (312967) 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, 52159 + ... + 52164.

It is an arithmetic number, because the mean of its divisors is an integer number (104324).

2³¹²⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

312969 is a deficient number, since it is larger than the sum of its proper divisors (104327).

312969 is a wasteful number, since it uses less digits than its factorization.

312969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104326.

The product of its digits is 2916, while the sum is 30.

The square root of 312969 is about 559.4363234542. The cubic root of 312969 is about 67.8943717621.

The spelling of 312969 in words is "three hundred twelve thousand, nine hundred sixty-nine".