8000000209 has 2 divisors, whose sum is σ = 8000000210. Its totient is φ = 8000000208.

The previous prime is 8000000149. The next prime is 8000000221. The reversal of 8000000209 is 9020000008.

8000000209 is digitally balanced in base 3, 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., 5640761025 + 2359239184 = 75105^2 + 48572^2 .

It is a cyclic number.

It is not a de Polignac number, because 8000000209 - 2⁷ = 8000000081 is a prime.

It is not a weakly prime, because it can be changed into another prime (8000000269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000000104 + 4000000105.

It is an arithmetic number, because the mean of its divisors is an integer number (4000000105).

Almost surely, 2^8000000209 is an apocalyptic number.

It is an amenable number.

8000000209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8000000209 is an equidigital number, since it uses as much as digits as its factorization.

8000000209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 8000000209 is about 89442.7202683371. The cubic root of 8000000209 is about 2000.0000174167. Note that the first 4 decimals are identical.

The spelling of 8000000209 in words is "eight billion, two hundred nine", and thus it is an aban number.