168911 has 4 divisors (see below), whose sum is σ = 172152. Its totient is φ = 165672.

The previous prime is 168901. The next prime is 168913. The reversal of 168911 is 119861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119861 = 7 ⋅17123.

It is a cyclic number.

It is not a de Polignac number, because 168911 - 2¹⁰ = 167887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1541 + ... + 1646.

It is an arithmetic number, because the mean of its divisors is an integer number (43038).

2¹⁶⁸⁹¹¹ is an apocalyptic number.

168911 is a deficient number, since it is larger than the sum of its proper divisors (3241).

168911 is an equidigital number, since it uses as much as digits as its factorization.

168911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240.

The product of its digits is 432, while the sum is 26.

The square root of 168911 is about 410.9878343698. The cubic root of 168911 is about 55.2780410882.

The spelling of 168911 in words is "one hundred sixty-eight thousand, nine hundred eleven".