206388873 has 12 divisors (see below), whose sum is σ = 299061828. Its totient is φ = 137156640.

The previous prime is 206388869. The next prime is 206388883. The reversal of 206388873 is 378883602.

206388873 is a `hidden beast` number, since 2 + 0 + 638 + 8 + 8 + 7 + 3 = 666.

206388873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 92390544 + 113998329 = 9612^2 + 10677^2 .

It is not a de Polignac number, because 206388873 - 2² = 206388869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206388883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33318 + ... + 39023.

It is an arithmetic number, because the mean of its divisors is an integer number (24921819).

Almost surely, 2^206388873 is an apocalyptic number.

It is an amenable number.

206388873 is a deficient number, since it is larger than the sum of its proper divisors (92672955).

206388873 is a wasteful number, since it uses less digits than its factorization.

206388873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72664 (or 72661 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 206388873 is about 14366.2407400127. The cubic root of 206388873 is about 590.9654527290.

The spelling of 206388873 in words is "two hundred six million, three hundred eighty-eight thousand, eight hundred seventy-three".