165879 has 12 divisors (see below), whose sum is σ = 273936. Its totient is φ = 94752.

The previous prime is 165877. The next prime is 165883. The reversal of 165879 is 978561.

It is not a de Polignac number, because 165879 - 2¹ = 165877 is a prime.

It is an Ulam number.

165879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254 + ... + 1379.

It is an arithmetic number, because the mean of its divisors is an integer number (22828).

165879 is a Friedman number, since it can be written as (7+5)^6/18-9, using all its digits and the basic arithmetic operations.

2¹⁶⁵⁸⁷⁹ is an apocalyptic number.

165879 is a deficient number, since it is larger than the sum of its proper divisors (108057).

165879 is a wasteful number, since it uses less digits than its factorization.

165879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646 (or 2643 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 165879 is about 407.2824572701. The cubic root of 165879 is about 54.9452899490.

The spelling of 165879 in words is "one hundred sixty-five thousand, eight hundred seventy-nine".