206649000709 has 2 divisors, whose sum is σ = 206649000710. Its totient is φ = 206649000708.

The previous prime is 206649000671. The next prime is 206649000713. The reversal of 206649000709 is 907000946602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206590248484 + 58752225 = 454522^2 + 7665^2 .

It is a cyclic number.

It is not a de Polignac number, because 206649000709 - 2⁷ = 206649000581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206649003709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103324500354 + 103324500355.

It is an arithmetic number, because the mean of its divisors is an integer number (103324500355).

Almost surely, 2^206649000709 is an apocalyptic number.

It is an amenable number.

206649000709 is a deficient number, since it is larger than the sum of its proper divisors (1).

206649000709 is an equidigital number, since it uses as much as digits as its factorization.

206649000709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 206649000709 in words is "two hundred six billion, six hundred forty-nine million, seven hundred nine", and thus it is an aban number.