200806009 has 2 divisors, whose sum is σ = 200806010. Its totient is φ = 200806008.

The previous prime is 200806007. The next prime is 200806049. The reversal of 200806009 is 900608002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156875625 + 43930384 = 12525^2 + 6628^2 .

It is a cyclic number.

It is not a de Polignac number, because 200806009 - 2¹ = 200806007 is a prime.

Together with 200806007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (200806007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100403004 + 100403005.

It is an arithmetic number, because the mean of its divisors is an integer number (100403005).

Almost surely, 2^200806009 is an apocalyptic number.

It is an amenable number.

200806009 is a deficient number, since it is larger than the sum of its proper divisors (1).

200806009 is an equidigital number, since it uses as much as digits as its factorization.

200806009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 200806009 is about 14170.6036921509. The cubic root of 200806009 is about 585.5880895425.

The spelling of 200806009 in words is "two hundred million, eight hundred six thousand, nine".