165109 has 8 divisors (see below), whose sum is σ = 191360. Its totient is φ = 139536.

The previous prime is 165103. The next prime is 165133. The reversal of 165109 is 901561.

165109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 165109 - 2¹¹ = 163061 is a prime.

It is a Duffinian number.

165109 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 165109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607 + ... + 835.

It is an arithmetic number, because the mean of its divisors is an integer number (23920).

2¹⁶⁵¹⁰⁹ is an apocalyptic number.

It is an amenable number.

165109 is a deficient number, since it is larger than the sum of its proper divisors (26251).

165109 is a wasteful number, since it uses less digits than its factorization.

165109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 165109 is about 406.3360678059. The cubic root of 165109 is about 54.8601405206.

The spelling of 165109 in words is "one hundred sixty-five thousand, one hundred nine".