206869085 has 4 divisors (see below), whose sum is σ = 248242908. Its totient is φ = 165495264.

The previous prime is 206869081. The next prime is 206869097. The reversal of 206869085 is 580968602.

It is a happy number.

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 53158681 + 153710404 = 7291^2 + 12398^2 .

It is a cyclic number.

It is not a de Polignac number, because 206869085 - 2² = 206869081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206869081) 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, 20686904 + ... + 20686913.

It is an arithmetic number, because the mean of its divisors is an integer number (62060727).

Almost surely, 2^206869085 is an apocalyptic number.

It is an amenable number.

206869085 is a deficient number, since it is larger than the sum of its proper divisors (41373823).

206869085 is an equidigital number, since it uses as much as digits as its factorization.

206869085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41373822.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 206869085 is about 14382.9442396194. The cubic root of 206869085 is about 591.4234375058.

The spelling of 206869085 in words is "two hundred six million, eight hundred sixty-nine thousand, eighty-five".