165329 has 4 divisors (see below), whose sum is σ = 171060. Its totient is φ = 159600.

The previous prime is 165317. The next prime is 165331. The reversal of 165329 is 923561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115600 + 49729 = 340^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 165329 - 2⁴ = 165313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165298 and 165307.

It is not an unprimeable number, because it can be changed into a prime (165349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2822 + ... + 2879.

It is an arithmetic number, because the mean of its divisors is an integer number (42765).

2¹⁶⁵³²⁹ is an apocalyptic number.

It is an amenable number.

165329 is a deficient number, since it is larger than the sum of its proper divisors (5731).

165329 is an equidigital number, since it uses as much as digits as its factorization.

165329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730.

The product of its digits is 1620, while the sum is 26.

The square root of 165329 is about 406.6066895662. The cubic root of 165329 is about 54.8844958946.

It can be divided in two parts, 165 and 329, that multiplied together give a triangular number (54285 = T₃₂₉).

The spelling of 165329 in words is "one hundred sixty-five thousand, three hundred twenty-nine".