204189 has 8 divisors (see below), whose sum is σ = 281760. Its totient is φ = 131376.

The previous prime is 204173. The next prime is 204233. The reversal of 204189 is 981402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204189 - 2⁴ = 204173 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 204189.

It is not an unprimeable number, because it can be changed into a prime (208189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (35220).

2²⁰⁴¹⁸⁹ is an apocalyptic number.

204189 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

204189 is a deficient number, since it is larger than the sum of its proper divisors (77571).

204189 is a wasteful number, since it uses less digits than its factorization.

204189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 204189 is about 451.8727697040. The cubic root of 204189 is about 58.8858272738.

It can be divided in two parts, 204 and 189, that added together give a palindrome (393).

The spelling of 204189 in words is "two hundred four thousand, one hundred eighty-nine".