312872869 has 4 divisors (see below), whose sum is σ = 313360096. Its totient is φ = 312385644.

The previous prime is 312872803. The next prime is 312872873. The reversal of 312872869 is 968278213.

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 not a de Polignac number, because 312872869 - 2²⁵ = 279318437 is a prime.

It is a super-2 number, since 2×312872869² = 195778864312582322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312872669) 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, 242649 + ... + 243934.

It is an arithmetic number, because the mean of its divisors is an integer number (78340024).

Almost surely, 2^312872869 is an apocalyptic number.

It is an amenable number.

312872869 is a deficient number, since it is larger than the sum of its proper divisors (487227).

312872869 is an equidigital number, since it uses as much as digits as its factorization.

312872869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487226.

The product of its digits is 290304, while the sum is 46.

The square root of 312872869 is about 17688.2127135559. The cubic root of 312872869 is about 678.8741961222.

It can be divided in two parts, 312 and 872869, that added together give a triangular number (873181 = T₁₃₂₁).

The spelling of 312872869 in words is "three hundred twelve million, eight hundred seventy-two thousand, eight hundred sixty-nine".