165797 has 4 divisors (see below), whose sum is σ = 170316. Its totient is φ = 161280.

The previous prime is 165779. The next prime is 165799. The reversal of 165797 is 797561.

165797 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.

It can be written as a sum of positive squares in 2 ways, for example, as 139876 + 25921 = 374^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 165797 - 2⁸ = 165541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 165797.

It is not an unprimeable number, because it can be changed into a prime (165799) 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, 2204 + ... + 2277.

It is an arithmetic number, because the mean of its divisors is an integer number (42579).

2¹⁶⁵⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

165797 is a deficient number, since it is larger than the sum of its proper divisors (4519).

165797 is an equidigital number, since it uses as much as digits as its factorization.

165797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518.

The product of its digits is 13230, while the sum is 35.

The square root of 165797 is about 407.1817775883. The cubic root of 165797 is about 54.9362346409.

The spelling of 165797 in words is "one hundred sixty-five thousand, seven hundred ninety-seven".