312831593909 has 4 divisors (see below), whose sum is σ = 322922935680. Its totient is φ = 302740252140.

The previous prime is 312831593903. The next prime is 312831593959. The reversal of 312831593909 is 909395138213.

It is a happy number.

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 312831593909 - 2²⁰ = 312830545333 is a prime.

It is a super-2 number, since 2×312831593909² (a number of 24 digits) 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 (312831593903) 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, 5045670839 + ... + 5045670900.

It is an arithmetic number, because the mean of its divisors is an integer number (80730733920).

Almost surely, 2^312831593909 is an apocalyptic number.

It is an amenable number.

312831593909 is a deficient number, since it is larger than the sum of its proper divisors (10091341771).

312831593909 is a wasteful number, since it uses less digits than its factorization.

312831593909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10091341770.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 312831593909 in words is "three hundred twelve billion, eight hundred thirty-one million, five hundred ninety-three thousand, nine hundred nine".