809452023 has 4 divisors (see below), whose sum is σ = 1079269368. Its totient is φ = 539634680.

The previous prime is 809451977. The next prime is 809452027. The reversal of 809452023 is 320254908.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 809452023 - 2¹⁴ = 809435639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809452027) 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 3 ways as a sum of consecutive naturals, for example, 134908668 + ... + 134908673.

It is an arithmetic number, because the mean of its divisors is an integer number (269817342).

Almost surely, 2^809452023 is an apocalyptic number.

809452023 is a deficient number, since it is larger than the sum of its proper divisors (269817345).

809452023 is a wasteful number, since it uses less digits than its factorization.

809452023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269817344.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 809452023 is about 28450.8703381812. The cubic root of 809452023 is about 931.9594954829.

The spelling of 809452023 in words is "eight hundred nine million, four hundred fifty-two thousand, twenty-three".