168865 has 4 divisors (see below), whose sum is σ = 202644. Its totient is φ = 135088.

The previous prime is 168863. The next prime is 168869. The reversal of 168865 is 568861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568861 = 619 ⋅919.

It can be written as a sum of positive squares in 2 ways, for example, as 80656 + 88209 = 284^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 168865 - 2¹ = 168863 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 168865.

It is not an unprimeable number, because it can be changed into a prime (168863) 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, 16882 + ... + 16891.

It is an arithmetic number, because the mean of its divisors is an integer number (50661).

2¹⁶⁸⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

168865 is a deficient number, since it is larger than the sum of its proper divisors (33779).

168865 is an equidigital number, since it uses as much as digits as its factorization.

168865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33778.

The product of its digits is 11520, while the sum is 34.

The square root of 168865 is about 410.9318678321. The cubic root of 168865 is about 55.2730226254.

The spelling of 168865 in words is "one hundred sixty-eight thousand, eight hundred sixty-five".