8000000809 has 2 divisors, whose sum is σ = 8000000810. Its totient is φ = 8000000808.

The previous prime is 8000000797. The next prime is 8000000821. The reversal of 8000000809 is 9080000008.

8000000809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (8000000797) and next prime (8000000821).

It can be written as a sum of positive squares in only one way, i.e., 7028307225 + 971693584 = 83835^2 + 31172^2 .

It is a cyclic number.

It is not a de Polignac number, because 8000000809 - 2⁷ = 8000000681 is a prime.

It is not a weakly prime, because it can be changed into another prime (8000000839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000000404 + 4000000405.

It is an arithmetic number, because the mean of its divisors is an integer number (4000000405).

Almost surely, 2^8000000809 is an apocalyptic number.

It is an amenable number.

8000000809 is a deficient number, since it is larger than the sum of its proper divisors (1).

8000000809 is an equidigital number, since it uses as much as digits as its factorization.

8000000809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 8000000809 is about 89442.7236224390. The cubic root of 8000000809 is about 2000.0000674167. Note that the first 4 decimals are identical.

The spelling of 8000000809 in words is "eight billion, eight hundred nine", and thus it is an aban number.