168536189 has 2 divisors, whose sum is σ = 168536190. Its totient is φ = 168536188.

The previous prime is 168536183. The next prime is 168536261. The reversal of 168536189 is 981635861.

168536189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137288089 + 31248100 = 11717^2 + 5590^2 .

It is a cyclic number.

It is not a de Polignac number, because 168536189 - 2²⁰ = 167487613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168536183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84268094 + 84268095.

It is an arithmetic number, because the mean of its divisors is an integer number (84268095).

Almost surely, 2^168536189 is an apocalyptic number.

It is an amenable number.

168536189 is a deficient number, since it is larger than the sum of its proper divisors (1).

168536189 is an equidigital number, since it uses as much as digits as its factorization.

168536189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 168536189 is about 12982.1488591065. The cubic root of 168536189 is about 552.3712375763.

The spelling of 168536189 in words is "one hundred sixty-eight million, five hundred thirty-six thousand, one hundred eighty-nine".