809387091 has 12 divisors (see below), whose sum is σ = 1206828480. Its totient is φ = 522185040.

The previous prime is 809387077. The next prime is 809387107. The reversal of 809387091 is 190783908.

It is not a de Polignac number, because 809387091 - 2⁹ = 809386579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (809387011) 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 11 ways as a sum of consecutive naturals, for example, 1450236 + ... + 1450793.

It is an arithmetic number, because the mean of its divisors is an integer number (100569040).

Almost surely, 2^809387091 is an apocalyptic number.

809387091 is a deficient number, since it is larger than the sum of its proper divisors (397441389).

809387091 is a wasteful number, since it uses less digits than its factorization.

809387091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901066 (or 2901063 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 809387091 is about 28449.7291902753. The cubic root of 809387091 is about 931.9345750798.

The spelling of 809387091 in words is "eight hundred nine million, three hundred eighty-seven thousand, ninety-one".