165593 has 4 divisors (see below), whose sum is σ = 169488. Its totient is φ = 161700.

The previous prime is 165589. The next prime is 165601. The reversal of 165593 is 395561.

165593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 165593 - 2² = 165589 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165523) 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, 1883 + ... + 1968.

It is an arithmetic number, because the mean of its divisors is an integer number (42372).

2¹⁶⁵⁵⁹³ is an apocalyptic number.

It is an amenable number.

165593 is a deficient number, since it is larger than the sum of its proper divisors (3895).

165593 is an equidigital number, since it uses as much as digits as its factorization.

165593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894.

The product of its digits is 4050, while the sum is 29.

The square root of 165593 is about 406.9311981158. The cubic root of 165593 is about 54.9136938401.

The spelling of 165593 in words is "one hundred sixty-five thousand, five hundred ninety-three".