204593 has 4 divisors (see below), whose sum is σ = 206580. Its totient is φ = 202608.

The previous prime is 204587. The next prime is 204599. The reversal of 204593 is 395402.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (204587) and next prime (204599).

It can be written as a sum of positive squares in 2 ways, for example, as 135424 + 69169 = 368^2 + 263^2 .

It is a cyclic number.

It is not a de Polignac number, because 204593 - 2¹⁰ = 203569 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204599) 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, 830 + ... + 1047.

It is an arithmetic number, because the mean of its divisors is an integer number (51645).

2²⁰⁴⁵⁹³ is an apocalyptic number.

It is an amenable number.

204593 is a deficient number, since it is larger than the sum of its proper divisors (1987).

204593 is a wasteful number, since it uses less digits than its factorization.

204593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 204593 is about 452.3195772902. The cubic root of 204593 is about 58.9246380513.

Adding to 204593 its reverse (395402), we get a palindrome (599995).

It can be divided in two parts, 204 and 593, that added together give a palindrome (797).

The spelling of 204593 in words is "two hundred four thousand, five hundred ninety-three".