204173 has 2 divisors, whose sum is σ = 204174. Its totient is φ = 204172.

The previous prime is 204163. The next prime is 204233. The reversal of 204173 is 371402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103684 + 100489 = 322^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 204173 - 2¹⁶ = 138637 is a prime.

It is a super-2 number, since 2×204173² = 83373227858, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102086 + 102087.

It is an arithmetic number, because the mean of its divisors is an integer number (102087).

2²⁰⁴¹⁷³ is an apocalyptic number.

It is an amenable number.

204173 is a deficient number, since it is larger than the sum of its proper divisors (1).

204173 is an equidigital number, since it uses as much as digits as its factorization.

204173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 204173 is about 451.8550652588. The cubic root of 204173 is about 58.8842891599.

Adding to 204173 its reverse (371402), we get a palindrome (575575).

The spelling of 204173 in words is "two hundred four thousand, one hundred seventy-three", and thus it is an iban number.