189185 has 8 divisors (see below), whose sum is σ = 229416. Its totient is φ = 149760.

The previous prime is 189169. The next prime is 189187. The reversal of 189185 is 581981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21904 + 167281 = 148^2 + 409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189185 - 2⁴ = 189169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665 + ... + 905.

It is an arithmetic number, because the mean of its divisors is an integer number (28677).

2¹⁸⁹¹⁸⁵ is an apocalyptic number.

It is an amenable number.

189185 is a deficient number, since it is larger than the sum of its proper divisors (40231).

189185 is a wasteful number, since it uses less digits than its factorization.

189185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403.

The product of its digits is 2880, while the sum is 32.

The square root of 189185 is about 434.9540205585. The cubic root of 189185 is about 57.4066538358.

The spelling of 189185 in words is "one hundred eighty-nine thousand, one hundred eighty-five".