205887087 has 12 divisors (see below), whose sum is σ = 339877200. Its totient is φ = 117649728.

The previous prime is 205887043. The next prime is 205887091. The reversal of 205887087 is 780788502.

It is a happy number.

It is not a de Polignac number, because 205887087 - 2¹⁰ = 205886063 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205885087) 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, 1633962 + ... + 1634087.

It is an arithmetic number, because the mean of its divisors is an integer number (28323100).

Almost surely, 2^205887087 is an apocalyptic number.

205887087 is a deficient number, since it is larger than the sum of its proper divisors (133990113).

205887087 is a wasteful number, since it uses less digits than its factorization.

205887087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268062 (or 3268059 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 205887087 is about 14348.7660445071. The cubic root of 205887087 is about 590.4861329020.

The spelling of 205887087 in words is "two hundred five million, eight hundred eighty-seven thousand, eighty-seven".