809812023 has 8 divisors (see below), whose sum is σ = 1080067968. Its totient is φ = 539715384.

The previous prime is 809811997. The next prime is 809812043. The reversal of 809812023 is 320218908.

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

It is not a de Polignac number, because 809812023 - 2⁸ = 809811767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809812043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27411 + ... + 48692.

It is an arithmetic number, because the mean of its divisors is an integer number (135008496).

Almost surely, 2^809812023 is an apocalyptic number.

809812023 is a deficient number, since it is larger than the sum of its proper divisors (270255945).

809812023 is a wasteful number, since it uses less digits than its factorization.

809812023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79653.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 809812023 is about 28457.1963306296. The cubic root of 809812023 is about 932.0976365474.

The spelling of 809812023 in words is "eight hundred nine million, eight hundred twelve thousand, twenty-three".