809744223 has 32 divisors (see below), whose sum is σ = 1194476800. Its totient is φ = 485968896.

The previous prime is 809744209. The next prime is 809744237. The reversal of 809744223 is 322447908.

It is an interprime number because it is at equal distance from previous prime (809744209) and next prime (809744237).

It is not a de Polignac number, because 809744223 - 2⁵ = 809744191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809744203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86223 + ... + 95151.

It is an arithmetic number, because the mean of its divisors is an integer number (37327400).

Almost surely, 2^809744223 is an apocalyptic number.

809744223 is a deficient number, since it is larger than the sum of its proper divisors (384732577).

809744223 is a wasteful number, since it uses less digits than its factorization.

809744223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9031.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 809744223 is about 28456.0050428728. The cubic root of 809744223 is about 932.0716231099.

The spelling of 809744223 in words is "eight hundred nine million, seven hundred forty-four thousand, two hundred twenty-three".