206868205 has 4 divisors (see below), whose sum is σ = 248241852. Its totient is φ = 165494560.

The previous prime is 206868199. The next prime is 206868217. The reversal of 206868205 is 502868602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 155301444 + 51566761 = 12462^2 + 7181^2 .

It is not a de Polignac number, because 206868205 - 2⁹ = 206867693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20686816 + ... + 20686825.

It is an arithmetic number, because the mean of its divisors is an integer number (62060463).

Almost surely, 2^206868205 is an apocalyptic number.

It is an amenable number.

206868205 is a deficient number, since it is larger than the sum of its proper divisors (41373647).

206868205 is an equidigital number, since it uses as much as digits as its factorization.

206868205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41373646.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 206868205 is about 14382.9136477975. The cubic root of 206868205 is about 591.4225988863.

The spelling of 206868205 in words is "two hundred six million, eight hundred sixty-eight thousand, two hundred five".