168889861 has 16 divisors (see below), whose sum is σ = 195552000. Its totient is φ = 142875648.

The previous prime is 168889843. The next prime is 168889927. The reversal of 168889861 is 168988861.

It is a cyclic number.

It is not a de Polignac number, because 168889861 - 2⁷ = 168889733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168889361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200880 + ... + 201718.

It is an arithmetic number, because the mean of its divisors is an integer number (12222000).

Almost surely, 2^168889861 is an apocalyptic number.

It is an amenable number.

168889861 is a deficient number, since it is larger than the sum of its proper divisors (26662139).

168889861 is a wasteful number, since it uses less digits than its factorization.

168889861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its digits is 1327104, while the sum is 55.

The square root of 168889861 is about 12995.7631942106. The cubic root of 168889861 is about 552.7573499951.

The spelling of 168889861 in words is "one hundred sixty-eight million, eight hundred eighty-nine thousand, eight hundred sixty-one".