165169 has 4 divisors (see below), whose sum is σ = 166000. Its totient is φ = 164340.

The previous prime is 165161. The next prime is 165173. The reversal of 165169 is 961561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 165169 - 2³ = 165161 is a prime.

It is a super-2 number, since 2×165169² = 54561597122, which contains 22 as substring.

It is a Duffinian number.

165169 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (165161) 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 3 ways as a sum of consecutive naturals, for example, 82 + ... + 580.

It is an arithmetic number, because the mean of its divisors is an integer number (41500).

2¹⁶⁵¹⁶⁹ is an apocalyptic number.

It is an amenable number.

165169 is a deficient number, since it is larger than the sum of its proper divisors (831).

165169 is an equidigital number, since it uses as much as digits as its factorization.

165169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830.

The product of its digits is 1620, while the sum is 28.

The square root of 165169 is about 406.4098916119. The cubic root of 165169 is about 54.8667850399.

The spelling of 165169 in words is "one hundred sixty-five thousand, one hundred sixty-nine".