204659 has 12 divisors (see below), whose sum is σ = 254736. Its totient is φ = 160992.

The previous prime is 204641. The next prime is 204667. The reversal of 204659 is 956402.

It is not a de Polignac number, because 204659 - 2¹⁶ = 139123 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (204679) 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, 1097 + ... + 1269.

It is an arithmetic number, because the mean of its divisors is an integer number (21228).

2²⁰⁴⁶⁵⁹ is an apocalyptic number.

204659 is a deficient number, since it is larger than the sum of its proper divisors (50077).

204659 is a wasteful number, since it uses less digits than its factorization.

204659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 204659 is about 452.3925286739. The cubic root of 204659 is about 58.9309735695.

The spelling of 204659 in words is "two hundred four thousand, six hundred fifty-nine".