809059623 has 4 divisors (see below), whose sum is σ = 1078746168. Its totient is φ = 539373080.

The previous prime is 809059621. The next prime is 809059651. The reversal of 809059623 is 326950908.

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 809059623 - 2¹ = 809059621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809059621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134843268 + ... + 134843273.

It is an arithmetic number, because the mean of its divisors is an integer number (269686542).

Almost surely, 2^809059623 is an apocalyptic number.

809059623 is a deficient number, since it is larger than the sum of its proper divisors (269686545).

809059623 is a wasteful number, since it uses less digits than its factorization.

809059623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269686544.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 809059623 is about 28443.9734038689. The cubic root of 809059623 is about 931.8088750609.

The spelling of 809059623 in words is "eight hundred nine million, fifty-nine thousand, six hundred twenty-three".