808043909 has 2 divisors, whose sum is σ = 808043910. Its totient is φ = 808043908.

The previous prime is 808043893. The next prime is 808043939. The reversal of 808043909 is 909340808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687593284 + 120450625 = 26222^2 + 10975^2 .

It is a cyclic number.

It is not a de Polignac number, because 808043909 - 2⁴ = 808043893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808043939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404021954 + 404021955.

It is an arithmetic number, because the mean of its divisors is an integer number (404021955).

Almost surely, 2^808043909 is an apocalyptic number.

It is an amenable number.

808043909 is a deficient number, since it is larger than the sum of its proper divisors (1).

808043909 is an equidigital number, since it uses as much as digits as its factorization.

808043909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 808043909 is about 28426.1131532259. The cubic root of 808043909 is about 931.4187729243.

The spelling of 808043909 in words is "eight hundred eight million, forty-three thousand, nine hundred nine".