204863 has 4 divisors (see below), whose sum is σ = 205800. Its totient is φ = 203928.

The previous prime is 204859. The next prime is 204871. The reversal of 204863 is 368402.

It is a happy number.

204863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 204863 - 2² = 204859 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 (204803) 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, 56 + ... + 642.

It is an arithmetic number, because the mean of its divisors is an integer number (51450).

2²⁰⁴⁸⁶³ is an apocalyptic number.

204863 is a deficient number, since it is larger than the sum of its proper divisors (937).

204863 is an equidigital number, since it uses as much as digits as its factorization.

204863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 204863 is about 452.6179404310. The cubic root of 204863 is about 58.9505474728.

The spelling of 204863 in words is "two hundred four thousand, eight hundred sixty-three".