206680689 has 48 divisors (see below), whose sum is σ = 328007680. Its totient is φ = 124921440.

The previous prime is 206680687. The next prime is 206680697. The reversal of 206680689 is 986086602.

It is not a de Polignac number, because 206680689 - 2¹ = 206680687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206680681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 673074 + ... + 673380.

Almost surely, 2^206680689 is an apocalyptic number.

It is an amenable number.

206680689 is a deficient number, since it is larger than the sum of its proper divisors (121326991).

206680689 is a wasteful number, since it uses less digits than its factorization.

206680689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 206680689 is about 14376.3934628960. The cubic root of 206680689 is about 591.2438462262.

The spelling of 206680689 in words is "two hundred six million, six hundred eighty thousand, six hundred eighty-nine".