206805063 has 16 divisors (see below), whose sum is σ = 291041280. Its totient is φ = 130258944.

The previous prime is 206805043. The next prime is 206805077. The reversal of 206805063 is 360508602.

It is not a de Polignac number, because 206805063 - 2¹⁴ = 206788679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206805063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206805043) 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 15 ways as a sum of consecutive naturals, for example, 17095 + ... + 26567.

It is an arithmetic number, because the mean of its divisors is an integer number (18190080).

Almost surely, 2^206805063 is an apocalyptic number.

206805063 is a deficient number, since it is larger than the sum of its proper divisors (84236217).

206805063 is a wasteful number, since it uses less digits than its factorization.

206805063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9878.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 206805063 is about 14380.7184451960. The cubic root of 206805063 is about 591.3624198207.

The spelling of 206805063 in words is "two hundred six million, eight hundred five thousand, sixty-three".