204002173 has 2 divisors, whose sum is σ = 204002174. Its totient is φ = 204002172.

The previous prime is 204002171. The next prime is 204002209. The reversal of 204002173 is 371200402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203404644 + 597529 = 14262^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 204002173 - 2¹ = 204002171 is a prime.

Together with 204002171, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 204002173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204002171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102001086 + 102001087.

It is an arithmetic number, because the mean of its divisors is an integer number (102001087).

Almost surely, 2^204002173 is an apocalyptic number.

It is an amenable number.

204002173 is a deficient number, since it is larger than the sum of its proper divisors (1).

204002173 is an equidigital number, since it uses as much as digits as its factorization.

204002173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 204002173 is about 14282.9329270987. The cubic root of 204002173 is about 588.6786218674.

Adding to 204002173 its reverse (371200402), we get a palindrome (575202575).

The spelling of 204002173 in words is "two hundred four million, two thousand, one hundred seventy-three".