168005 has 4 divisors (see below), whose sum is σ = 201612. Its totient is φ = 134400.

The previous prime is 167987. The next prime is 168013. The reversal of 168005 is 500861.

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 21316 + 146689 = 146^2 + 383^2 .

It is not a de Polignac number, because 168005 - 2¹² = 163909 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16796 + ... + 16805.

It is an arithmetic number, because the mean of its divisors is an integer number (50403).

2¹⁶⁸⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

168005 is a deficient number, since it is larger than the sum of its proper divisors (33607).

168005 is an equidigital number, since it uses as much as digits as its factorization.

168005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33606.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 168005 is about 409.8841299685. The cubic root of 168005 is about 55.1790309278.

Adding to 168005 its reverse (500861), we get a palindrome (668866).

The spelling of 168005 in words is "one hundred sixty-eight thousand, five".