809323918 has 16 divisors (see below), whose sum is σ = 1314222336. Its totient is φ = 371576160.

The previous prime is 809323897. The next prime is 809323937. The reversal of 809323918 is 819323908.

It is a happy number.

809323918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76521 + ... + 86452.

It is an arithmetic number, because the mean of its divisors is an integer number (82138896).

Almost surely, 2^809323918 is an apocalyptic number.

809323918 is a deficient number, since it is larger than the sum of its proper divisors (504898418).

809323918 is a wasteful number, since it uses less digits than its factorization.

809323918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163179.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 809323918 is about 28448.6189119964. The cubic root of 809323918 is about 931.9103284882.

The spelling of 809323918 in words is "eight hundred nine million, three hundred twenty-three thousand, nine hundred eighteen".