312891343429 has 6 divisors (see below), whose sum is σ = 363975644454. Its totient is φ = 268192580040.

The previous prime is 312891343423. The next prime is 312891343447. The reversal of 312891343429 is 924343198213.

It can be written as a sum of positive squares in only one way, i.e., 189969581025 + 122921762404 = 435855^2 + 350602^2 .

It is not a de Polignac number, because 312891343429 - 2⁷ = 312891343301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 6385537621 = 312891343429 / (3 + 1 + 2 + 8 + 9 + 1 + 3 + 4 + 3 + 4 + 2 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312891343423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3192768762 + ... + 3192768859.

It is an arithmetic number, because the mean of its divisors is an integer number (60662607409).

Almost surely, 2^312891343429 is an apocalyptic number.

It is an amenable number.

312891343429 is a deficient number, since it is larger than the sum of its proper divisors (51084301025).

312891343429 is an equidigital number, since it uses as much as digits as its factorization.

312891343429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385537635 (or 6385537628 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The spelling of 312891343429 in words is "three hundred twelve billion, eight hundred ninety-one million, three hundred forty-three thousand, four hundred twenty-nine".