809253091 has 36 divisors (see below), whose sum is σ = 936352872. Its totient is φ = 696838912.

The previous prime is 809253089. The next prime is 809253103. The reversal of 809253091 is 190352908.

It is not a de Polignac number, because 809253091 - 2¹ = 809253089 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 809253091.

It is not an unprimeable number, because it can be changed into a prime (809253041) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7563060 + ... + 7563166.

It is an arithmetic number, because the mean of its divisors is an integer number (26009802).

Almost surely, 2^809253091 is an apocalyptic number.

809253091 is a deficient number, since it is larger than the sum of its proper divisors (127099781).

809253091 is a wasteful number, since it uses less digits than its factorization.

809253091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 809253091 is about 28447.3740615896. The cubic root of 809253091 is about 931.8831426948.

The spelling of 809253091 in words is "eight hundred nine million, two hundred fifty-three thousand, ninety-one".