165173 has 2 divisors, whose sum is σ = 165174. Its totient is φ = 165172.

The previous prime is 165161. The next prime is 165181. The reversal of 165173 is 371561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117649 + 47524 = 343^2 + 218^2 .

It is an emirp because it is prime and its reverse (371561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165173 - 2¹⁰ = 164149 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82586 + 82587.

It is an arithmetic number, because the mean of its divisors is an integer number (82587).

2¹⁶⁵¹⁷³ is an apocalyptic number.

It is an amenable number.

165173 is a deficient number, since it is larger than the sum of its proper divisors (1).

165173 is an equidigital number, since it uses as much as digits as its factorization.

165173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630, while the sum is 23.

The square root of 165173 is about 406.4148127222. The cubic root of 165173 is about 54.8672279506.

The spelling of 165173 in words is "one hundred sixty-five thousand, one hundred seventy-three".