204399 has 12 divisors (see below), whose sum is σ = 318136. Its totient is φ = 125712.

The previous prime is 204397. The next prime is 204427. The reversal of 204399 is 993402.

It is not a de Polignac number, because 204399 - 2¹ = 204397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204397) 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, 757 + ... + 990.

2²⁰⁴³⁹⁹ is an apocalyptic number.

204399 is a deficient number, since it is larger than the sum of its proper divisors (113737).

204399 is a wasteful number, since it uses less digits than its factorization.

204399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766 (or 1763 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 204399 is about 452.1050762821. The cubic root of 204399 is about 58.9060075755.

The spelling of 204399 in words is "two hundred four thousand, three hundred ninety-nine".