205039 has 4 divisors (see below), whose sum is σ = 205960. Its totient is φ = 204120.

The previous prime is 205033. The next prime is 205043. The reversal of 205039 is 930502.

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 205039 - 2³ = 205031 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 (205031) 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, 109 + ... + 649.

It is an arithmetic number, because the mean of its divisors is an integer number (51490).

2²⁰⁵⁰³⁹ is an apocalyptic number.

205039 is a deficient number, since it is larger than the sum of its proper divisors (921).

205039 is an equidigital number, since it uses as much as digits as its factorization.

205039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 205039 is about 452.8123231539. The cubic root of 205039 is about 58.9674243231.

The spelling of 205039 in words is "two hundred five thousand, thirty-nine".