206684879 has 2 divisors, whose sum is σ = 206684880. Its totient is φ = 206684878.

The previous prime is 206684833. The next prime is 206684887. The reversal of 206684879 is 978486602.

206684879 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 a de Polignac number, because none of the positive numbers 2^k-206684879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206684809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103342439 + 103342440.

It is an arithmetic number, because the mean of its divisors is an integer number (103342440).

Almost surely, 2^206684879 is an apocalyptic number.

206684879 is a deficient number, since it is larger than the sum of its proper divisors (1).

206684879 is an equidigital number, since it uses as much as digits as its factorization.

206684879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 206684879 is about 14376.5391871618. The cubic root of 206684879 is about 591.2478415922.

The spelling of 206684879 in words is "two hundred six million, six hundred eighty-four thousand, eight hundred seventy-nine".