204005887 has 4 divisors (see below), whose sum is σ = 206588320. Its totient is φ = 201423456.

The previous prime is 204005881. The next prime is 204005903. The reversal of 204005887 is 788500402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204005887 - 2¹⁹ = 203481599 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 (204005881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291098 + ... + 1291255.

It is an arithmetic number, because the mean of its divisors is an integer number (51647080).

Almost surely, 2^204005887 is an apocalyptic number.

204005887 is a deficient number, since it is larger than the sum of its proper divisors (2582433).

204005887 is an equidigital number, since it uses as much as digits as its factorization.

204005887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582432.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 204005887 is about 14283.0629418203. The cubic root of 204005887 is about 588.6821942789.

The spelling of 204005887 in words is "two hundred four million, five thousand, eight hundred eighty-seven".