189166 has 4 divisors (see below), whose sum is σ = 283752. Its totient is φ = 94582.

The previous prime is 189151. The next prime is 189169. The reversal of 189166 is 661981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661981 = 103 ⋅6427.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189169) by changing a digit.

189166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 47290 + ... + 47293.

It is an arithmetic number, because the mean of its divisors is an integer number (70938).

2¹⁸⁹¹⁶⁶ is an apocalyptic number.

189166 is a deficient number, since it is larger than the sum of its proper divisors (94586).

189166 is an equidigital number, since it uses as much as digits as its factorization.

189166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94585.

The product of its digits is 2592, while the sum is 31.

The square root of 189166 is about 434.9321786210. The cubic root of 189166 is about 57.4047319728.

The spelling of 189166 in words is "one hundred eighty-nine thousand, one hundred sixty-six".