206605923 has 16 divisors (see below), whose sum is σ = 279692160. Its totient is φ = 135644544.

The previous prime is 206605873. The next prime is 206605951. The reversal of 206605923 is 329506602.

It is not a de Polignac number, because 206605923 - 2⁸ = 206605667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206605723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53388 + ... + 57126.

It is an arithmetic number, because the mean of its divisors is an integer number (17480760).

Almost surely, 2^206605923 is an apocalyptic number.

206605923 is a deficient number, since it is larger than the sum of its proper divisors (73086237).

206605923 is a wasteful number, since it uses less digits than its factorization.

206605923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 206605923 is about 14373.7929232336. The cubic root of 206605923 is about 591.1725441789.

The spelling of 206605923 in words is "two hundred six million, six hundred five thousand, nine hundred twenty-three".