206608085 has 4 divisors (see below), whose sum is σ = 247929708. Its totient is φ = 165286464.

The previous prime is 206608081. The next prime is 206608097. The reversal of 206608085 is 580806602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580806602 = 2 ⋅290403301.

It can be written as a sum of positive squares in 2 ways, for example, as 101566084 + 105042001 = 10078^2 + 10249^2 .

It is a cyclic number.

It is not a de Polignac number, because 206608085 - 2² = 206608081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206608081) 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 3 ways as a sum of consecutive naturals, for example, 20660804 + ... + 20660813.

It is an arithmetic number, because the mean of its divisors is an integer number (61982427).

Almost surely, 2^206608085 is an apocalyptic number.

It is an amenable number.

206608085 is a deficient number, since it is larger than the sum of its proper divisors (41321623).

206608085 is an equidigital number, since it uses as much as digits as its factorization.

206608085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41321622.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 206608085 is about 14373.8681293520. The cubic root of 206608085 is about 591.1746062536.

The spelling of 206608085 in words is "two hundred six million, six hundred eight thousand, eighty-five".