204134173 has 2 divisors, whose sum is σ = 204134174. Its totient is φ = 204134172.

The previous prime is 204134171. The next prime is 204134197. The reversal of 204134173 is 371431402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167495364 + 36638809 = 12942^2 + 6053^2 .

It is a cyclic number.

It is not a de Polignac number, because 204134173 - 2¹ = 204134171 is a prime.

Together with 204134171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204134171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102067086 + 102067087.

It is an arithmetic number, because the mean of its divisors is an integer number (102067087).

Almost surely, 2^204134173 is an apocalyptic number.

It is an amenable number.

204134173 is a deficient number, since it is larger than the sum of its proper divisors (1).

204134173 is an equidigital number, since it uses as much as digits as its factorization.

204134173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 204134173 is about 14287.5530795165. The cubic root of 204134173 is about 588.8055630385.

Adding to 204134173 its reverse (371431402), we get a palindrome (575565575).

The spelling of 204134173 in words is "two hundred four million, one hundred thirty-four thousand, one hundred seventy-three".