168489589 has 2 divisors, whose sum is σ = 168489590. Its totient is φ = 168489588.

The previous prime is 168489521. The next prime is 168489593. The reversal of 168489589 is 985984861.

168489589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159138225 + 9351364 = 12615^2 + 3058^2 .

It is a cyclic number.

It is not a de Polignac number, because 168489589 - 2⁹ = 168489077 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 (168489509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84244794 + 84244795.

It is an arithmetic number, because the mean of its divisors is an integer number (84244795).

Almost surely, 2^168489589 is an apocalyptic number.

It is an amenable number.

168489589 is a deficient number, since it is larger than the sum of its proper divisors (1).

168489589 is an equidigital number, since it uses as much as digits as its factorization.

168489589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 58.

The square root of 168489589 is about 12980.3539628163. The cubic root of 168489589 is about 552.3203229476.

The spelling of 168489589 in words is "one hundred sixty-eight million, four hundred eighty-nine thousand, five hundred eighty-nine".