312812863 has 4 divisors (see below), whose sum is σ = 341250408. Its totient is φ = 284375320.

The previous prime is 312812813. The next prime is 312812873. The reversal of 312812863 is 368218213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368218213 = 11 ⋅33474383.

It is a cyclic number.

It is not a de Polignac number, because 312812863 - 2¹³ = 312804671 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 (312812813) 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, 14218756 + ... + 14218777.

It is an arithmetic number, because the mean of its divisors is an integer number (85312602).

Almost surely, 2^312812863 is an apocalyptic number.

312812863 is a deficient number, since it is larger than the sum of its proper divisors (28437545).

312812863 is a wasteful number, since it uses less digits than its factorization.

312812863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28437544.

The product of its digits is 13824, while the sum is 34.

The square root of 312812863 is about 17686.5164178817. The cubic root of 312812863 is about 678.8307928386.

The spelling of 312812863 in words is "three hundred twelve million, eight hundred twelve thousand, eight hundred sixty-three".