189173 has 4 divisors (see below), whose sum is σ = 191148. Its totient is φ = 187200.

The previous prime is 189169. The next prime is 189187. The reversal of 189173 is 371981.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91204 + 97969 = 302^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 189173 - 2² = 189169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836 + ... + 1037.

It is an arithmetic number, because the mean of its divisors is an integer number (47787).

2¹⁸⁹¹⁷³ is an apocalyptic number.

It is an amenable number.

189173 is a deficient number, since it is larger than the sum of its proper divisors (1975).

189173 is a wasteful number, since it uses less digits than its factorization.

189173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974.

The product of its digits is 1512, while the sum is 29.

The square root of 189173 is about 434.9402257782. The cubic root of 189173 is about 57.4054400425.

The spelling of 189173 in words is "one hundred eighty-nine thousand, one hundred seventy-three".