844971313 has 4 divisors (see below), whose sum is σ = 849217600. Its totient is φ = 840725028.

The previous prime is 844971241. The next prime is 844971319. The reversal of 844971313 is 313179448.

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 a de Polignac number, because none of the positive numbers 2^k-844971313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (844971319) 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, 2122845 + ... + 2123242.

It is an arithmetic number, because the mean of its divisors is an integer number (212304400).

Almost surely, 2^844971313 is an apocalyptic number.

It is an amenable number.

844971313 is a deficient number, since it is larger than the sum of its proper divisors (4246287).

844971313 is a wasteful number, since it uses less digits than its factorization.

844971313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246286.

The product of its digits is 72576, while the sum is 40.

The square root of 844971313 is about 29068.3902719088. The cubic root of 844971313 is about 945.3964958988.

The spelling of 844971313 in words is "eight hundred forty-four million, nine hundred seventy-one thousand, three hundred thirteen".