206795009 has 2 divisors, whose sum is σ = 206795010. Its totient is φ = 206795008.

The previous prime is 206794949. The next prime is 206795033. The reversal of 206795009 is 900597602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206784400 + 10609 = 14380^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 206795009 - 2²⁰ = 205746433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206195009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103397504 + 103397505.

It is an arithmetic number, because the mean of its divisors is an integer number (103397505).

Almost surely, 2^206795009 is an apocalyptic number.

It is an amenable number.

206795009 is a deficient number, since it is larger than the sum of its proper divisors (1).

206795009 is an equidigital number, since it uses as much as digits as its factorization.

206795009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 206795009 is about 14380.3688756582. The cubic root of 206795009 is about 591.3528364736.

The spelling of 206795009 in words is "two hundred six million, seven hundred ninety-five thousand, nine".