168243589 has 2 divisors, whose sum is σ = 168243590. Its totient is φ = 168243588.

The previous prime is 168243583. The next prime is 168243617. The reversal of 168243589 is 985342861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167495364 + 748225 = 12942^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 168243589 - 2⁵ = 168243557 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 (168243583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84121794 + 84121795.

It is an arithmetic number, because the mean of its divisors is an integer number (84121795).

Almost surely, 2^168243589 is an apocalyptic number.

It is an amenable number.

168243589 is a deficient number, since it is larger than the sum of its proper divisors (1).

168243589 is an equidigital number, since it uses as much as digits as its factorization.

168243589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 46.

The square root of 168243589 is about 12970.8746428296. The cubic root of 168243589 is about 552.0513904493.

The spelling of 168243589 in words is "one hundred sixty-eight million, two hundred forty-three thousand, five hundred eighty-nine".