206840909267 has 2 divisors, whose sum is σ = 206840909268. Its totient is φ = 206840909266.

The previous prime is 206840909251. The next prime is 206840909281. The reversal of 206840909267 is 762909048602.

206840909267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206840909267 - 2⁴ = 206840909251 is a prime.

It is not a weakly prime, because it can be changed into another prime (206840909167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103420454633 + 103420454634.

It is an arithmetic number, because the mean of its divisors is an integer number (103420454634).

Almost surely, 2^206840909267 is an apocalyptic number.

206840909267 is a deficient number, since it is larger than the sum of its proper divisors (1).

206840909267 is an equidigital number, since it uses as much as digits as its factorization.

206840909267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 206840909267 in words is "two hundred six billion, eight hundred forty million, nine hundred nine thousand, two hundred sixty-seven".