808609809 has 64 divisors (see below), whose sum is σ = 1347840000. Its totient is φ = 429710400.

The previous prime is 808609799. The next prime is 808609829. The reversal of 808609809 is 908906808.

It is not a de Polignac number, because 808609809 - 2⁹ = 808609297 is a prime.

It is a super-2 number, since 2×808609809² = 1307699646422032962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (808609829) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1153159 + ... + 1153859.

It is an arithmetic number, because the mean of its divisors is an integer number (21060000).

Almost surely, 2^808609809 is an apocalyptic number.

It is an amenable number.

808609809 is a deficient number, since it is larger than the sum of its proper divisors (539230191).

808609809 is a wasteful number, since it uses less digits than its factorization.

808609809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 808609809 is about 28436.0652868852. The cubic root of 808609809 is about 931.6361566908.

The spelling of 808609809 in words is "eight hundred eight million, six hundred nine thousand, eight hundred nine".