168881 has 4 divisors (see below), whose sum is σ = 169764. Its totient is φ = 168000.

The previous prime is 168869. The next prime is 168887. The reversal of 168881 is 188861.

It is a happy number.

168881 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 128881 + 40000 = 359^2 + 200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168881 is a prime.

It is a super-2 number, since 2×168881² = 57041584322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (168887) 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, 20 + ... + 581.

It is an arithmetic number, because the mean of its divisors is an integer number (42441).

2¹⁶⁸⁸⁸¹ is an apocalyptic number.

It is an amenable number.

168881 is a deficient number, since it is larger than the sum of its proper divisors (883).

168881 is an equidigital number, since it uses as much as digits as its factorization.

168881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882.

The product of its digits is 3072, while the sum is 32.

The square root of 168881 is about 410.9513353184. The cubic root of 168881 is about 55.2747682810.

The spelling of 168881 in words is "one hundred sixty-eight thousand, eight hundred eighty-one".