809838711 has 12 divisors (see below), whose sum is σ = 1276109640. Its totient is φ = 490811280.

The previous prime is 809838649. The next prime is 809838727. The reversal of 809838711 is 117838908.

It is not a de Polignac number, because 809838711 - 2⁷ = 809838583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809838751) 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, 4089996 + ... + 4090193.

It is an arithmetic number, because the mean of its divisors is an integer number (106342470).

Almost surely, 2^809838711 is an apocalyptic number.

809838711 is a deficient number, since it is larger than the sum of its proper divisors (466270929).

809838711 is a wasteful number, since it uses less digits than its factorization.

809838711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8180206 (or 8180203 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 809838711 is about 28457.6652415478. The cubic root of 809838711 is about 932.1078757749.

The spelling of 809838711 in words is "eight hundred nine million, eight hundred thirty-eight thousand, seven hundred eleven".