312979813 has 8 divisors (see below), whose sum is σ = 324470016. Its totient is φ = 301576800.

The previous prime is 312979811. The next prime is 312979841. The reversal of 312979813 is 318979213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312979813 - 2¹ = 312979811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312979813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312979811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14443 + ... + 28888.

It is an arithmetic number, because the mean of its divisors is an integer number (40558752).

Almost surely, 2^312979813 is an apocalyptic number.

It is an amenable number.

312979813 is a deficient number, since it is larger than the sum of its proper divisors (11490203).

312979813 is a wasteful number, since it uses less digits than its factorization.

312979813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43595.

The product of its digits is 81648, while the sum is 43.

The square root of 312979813 is about 17691.2354854035. The cubic root of 312979813 is about 678.9515366427.

The spelling of 312979813 in words is "three hundred twelve million, nine hundred seventy-nine thousand, eight hundred thirteen".