165189 has 16 divisors (see below), whose sum is σ = 241920. Its totient is φ = 99840.

The previous prime is 165181. The next prime is 165203. The reversal of 165189 is 981561.

It is a happy number.

It is not a de Polignac number, because 165189 - 2³ = 165181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165181) 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 15 ways as a sum of consecutive naturals, for example, 2052 + ... + 2130.

It is an arithmetic number, because the mean of its divisors is an integer number (15120).

2¹⁶⁵¹⁸⁹ is an apocalyptic number.

It is an amenable number.

165189 is a deficient number, since it is larger than the sum of its proper divisors (76731).

165189 is a wasteful number, since it uses less digits than its factorization.

165189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140.

The product of its digits is 2160, while the sum is 30.

The square root of 165189 is about 406.4344965674. The cubic root of 165189 is about 54.8689995220.

The spelling of 165189 in words is "one hundred sixty-five thousand, one hundred eighty-nine".