206684887 has 2 divisors, whose sum is σ = 206684888. Its totient is φ = 206684886.

The previous prime is 206684879. The next prime is 206684909. The reversal of 206684887 is 788486602.

206684887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206684887 - 2³ = 206684879 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206684887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206684587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103342443 + 103342444.

It is an arithmetic number, because the mean of its divisors is an integer number (103342444).

Almost surely, 2^206684887 is an apocalyptic number.

206684887 is a deficient number, since it is larger than the sum of its proper divisors (1).

206684887 is an equidigital number, since it uses as much as digits as its factorization.

206684887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The square root of 206684887 is about 14376.5394653929. The cubic root of 206684887 is about 591.2478492205.

The spelling of 206684887 in words is "two hundred six million, six hundred eighty-four thousand, eight hundred eighty-seven".