9000809 has 2 divisors, whose sum is σ = 9000810. Its totient is φ = 9000808.

The previous prime is 9000793. The next prime is 9000821. The reversal of 9000809 is 9080009.

It is a happy number.

9000809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8880400 + 120409 = 2980^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 9000809 - 2⁴ = 9000793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9000839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4500404 + 4500405.

It is an arithmetic number, because the mean of its divisors is an integer number (4500405).

Almost surely, 2^9000809 is an apocalyptic number.

It is an amenable number.

9000809 is a deficient number, since it is larger than the sum of its proper divisors (1).

9000809 is an equidigital number, since it uses as much as digits as its factorization.

9000809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 9000809 is about 3000.1348303035. The cubic root of 9000809 is about 208.0146146659.

The spelling of 9000809 in words is "nine million, eight hundred nine", and thus it is an aban number.