204199 has 4 divisors (see below), whose sum is σ = 207720. Its totient is φ = 200680.

The previous prime is 204173. The next prime is 204233. The reversal of 204199 is 991402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991402 = 2 ⋅495701.

It is a cyclic number.

It is not a de Polignac number, because 204199 - 2¹⁷ = 73127 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 (204299) 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 3 ways as a sum of consecutive naturals, for example, 1672 + ... + 1789.

It is an arithmetic number, because the mean of its divisors is an integer number (51930).

2²⁰⁴¹⁹⁹ is an apocalyptic number.

204199 is a deficient number, since it is larger than the sum of its proper divisors (3521).

204199 is an equidigital number, since it uses as much as digits as its factorization.

204199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 204199 is about 451.8838346301. The cubic root of 204199 is about 58.8867885542.

The spelling of 204199 in words is "two hundred four thousand, one hundred ninety-nine".