813744969 has 4 divisors (see below), whose sum is σ = 1084993296. Its totient is φ = 542496644.

The previous prime is 813744937. The next prime is 813744983. The reversal of 813744969 is 969447318.

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 813744969 - 2⁵ = 813744937 is a prime.

It is a super-2 number, since 2×813744969² = 1324361749145621922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813744929) 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, 135624159 + ... + 135624164.

It is an arithmetic number, because the mean of its divisors is an integer number (271248324).

Almost surely, 2^813744969 is an apocalyptic number.

It is an amenable number.

813744969 is a deficient number, since it is larger than the sum of its proper divisors (271248327).

813744969 is a wasteful number, since it uses less digits than its factorization.

813744969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271248326.

The product of its digits is 1306368, while the sum is 51.

The square root of 813744969 is about 28526.2154692837. The cubic root of 813744969 is about 933.6041470798.

The spelling of 813744969 in words is "eight hundred thirteen million, seven hundred forty-four thousand, nine hundred sixty-nine".