206689079 has 2 divisors, whose sum is σ = 206689080. Its totient is φ = 206689078.

The previous prime is 206689069. The next prime is 206689081. The reversal of 206689079 is 970986602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206689079 is a prime.

It is a Sophie Germain prime.

Together with 206689081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206689019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103344539 + 103344540.

It is an arithmetic number, because the mean of its divisors is an integer number (103344540).

Almost surely, 2^206689079 is an apocalyptic number.

206689079 is a deficient number, since it is larger than the sum of its proper divisors (1).

206689079 is an equidigital number, since it uses as much as digits as its factorization.

206689079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 206689079 is about 14376.6852577359. The cubic root of 206689079 is about 591.2518464394.

The spelling of 206689079 in words is "two hundred six million, six hundred eighty-nine thousand, seventy-nine".