165979 has 8 divisors (see below), whose sum is σ = 184320. Its totient is φ = 148200.

The previous prime is 165961. The next prime is 165983. The reversal of 165979 is 979561.

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 165979 - 2⁵ = 165947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165079) 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, 774 + ... + 964.

It is an arithmetic number, because the mean of its divisors is an integer number (23040).

2¹⁶⁵⁹⁷⁹ is an apocalyptic number.

165979 is a deficient number, since it is larger than the sum of its proper divisors (18341).

165979 is a wasteful number, since it uses less digits than its factorization.

165979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its digits is 17010, while the sum is 37.

The square root of 165979 is about 407.4052036977. The cubic root of 165979 is about 54.9563289699.

It can be divided in two parts, 16 and 5979, that added together give a palindrome (5995).

The spelling of 165979 in words is "one hundred sixty-five thousand, nine hundred seventy-nine".