808010809 has 4 divisors (see below), whose sum is σ = 808254720. Its totient is φ = 807766900.

The previous prime is 808010803. The next prime is 808010831. The reversal of 808010809 is 908010808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808010809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (808010803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116917 + ... + 123634.

It is an arithmetic number, because the mean of its divisors is an integer number (202063680).

Almost surely, 2^808010809 is an apocalyptic number.

It is an amenable number.

808010809 is a deficient number, since it is larger than the sum of its proper divisors (243911).

808010809 is a wasteful number, since it uses less digits than its factorization.

808010809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243910.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 808010809 is about 28425.5309361145. The cubic root of 808010809 is about 931.4060548109.

Subtracting 808010809 from its reverse (908010808), we obtain a palindrome (99999999).

The spelling of 808010809 in words is "eight hundred eight million, ten thousand, eight hundred nine".