812304823 has 24 divisors (see below), whose sum is σ = 945036288. Its totient is φ = 696234000.

The previous prime is 812304821. The next prime is 812304839. The reversal of 812304823 is 328403218.

It is not a de Polignac number, because 812304823 - 2¹ = 812304821 is a prime.

It is a super-2 number, since 2×812304823² = 1319678250938122658, which 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 (812304821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195538 + ... + 199648.

It is an arithmetic number, because the mean of its divisors is an integer number (39376512).

Almost surely, 2^812304823 is an apocalyptic number.

812304823 is a deficient number, since it is larger than the sum of its proper divisors (132731465).

812304823 is a wasteful number, since it uses less digits than its factorization.

812304823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227 (or 4216 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 812304823 is about 28500.9617907887. The cubic root of 812304823 is about 933.0530652381.

The spelling of 812304823 in words is "eight hundred twelve million, three hundred four thousand, eight hundred twenty-three".