168985 has 4 divisors (see below), whose sum is σ = 202788. Its totient is φ = 135184.

The previous prime is 168977. The next prime is 168991. The reversal of 168985 is 589861.

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 64009 + 104976 = 253^2 + 324^2 .

It is a cyclic number.

It is not a de Polignac number, because 168985 - 2³ = 168977 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16894 + ... + 16903.

It is an arithmetic number, because the mean of its divisors is an integer number (50697).

2¹⁶⁸⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

168985 is a deficient number, since it is larger than the sum of its proper divisors (33803).

168985 is an equidigital number, since it uses as much as digits as its factorization.

168985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33802.

The product of its digits is 17280, while the sum is 37.

The square root of 168985 is about 411.0778515075. The cubic root of 168985 is about 55.2861123562.

It can be divided in two parts, 1 and 68985, that added together give a palindrome (68986).

The spelling of 168985 in words is "one hundred sixty-eight thousand, nine hundred eighty-five".