206985 has 8 divisors (see below), whose sum is σ = 331200. Its totient is φ = 110384.

The previous prime is 206953. The next prime is 206993. The reversal of 206985 is 589602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206985 - 2⁵ = 206953 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6885 + ... + 6914.

It is an arithmetic number, because the mean of its divisors is an integer number (41400).

2²⁰⁶⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

206985 is a deficient number, since it is larger than the sum of its proper divisors (124215).

206985 is a wasteful number, since it uses less digits than its factorization.

206985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13807.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 206985 is about 454.9560418326. The cubic root of 206985 is about 59.1533881022.

The spelling of 206985 in words is "two hundred six thousand, nine hundred eighty-five".