168883861 has 4 divisors (see below), whose sum is σ = 169177132. Its totient is φ = 168590592.

The previous prime is 168883829. The next prime is 168883867. The reversal of 168883861 is 168388861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168388861 = 223 ⋅755107.

It can be written as a sum of positive squares in 2 ways, for example, as 165251025 + 3632836 = 12855^2 + 1906^2 .

It is a cyclic number.

It is not a de Polignac number, because 168883861 - 2⁵ = 168883829 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 (168883867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145770 + ... + 146923.

It is an arithmetic number, because the mean of its divisors is an integer number (42294283).

Almost surely, 2^168883861 is an apocalyptic number.

It is an amenable number.

168883861 is a deficient number, since it is larger than the sum of its proper divisors (293271).

168883861 is an equidigital number, since it uses as much as digits as its factorization.

168883861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293270.

The product of its digits is 442368, while the sum is 49.

The square root of 168883861 is about 12995.5323476955. The cubic root of 168883861 is about 552.7508041446.

It can be divided in two parts, 168883 and 861, that added together give a square (169744 = 412²).

The spelling of 168883861 in words is "one hundred sixty-eight million, eight hundred eighty-three thousand, eight hundred sixty-one".