68689543 has 6 divisors (see below), whose sum is σ = 74379984. Its totient is φ = 63405576.

The previous prime is 68689529. The next prime is 68689561. The reversal of 68689543 is 34598686.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-68689543 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 (68689343) 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 in 5 ways as a sum of consecutive naturals, for example, 203055 + ... + 203392.

It is an arithmetic number, because the mean of its divisors is an integer number (12396664).

Almost surely, 2^68689543 is an apocalyptic number.

68689543 is a deficient number, since it is larger than the sum of its proper divisors (5690441).

68689543 is a wasteful number, since it uses less digits than its factorization.

68689543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406473 (or 406460 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 68689543 is about 8287.9154797814. The cubic root of 68689543 is about 409.5405183725.

The spelling of 68689543 in words is "sixty-eight million, six hundred eighty-nine thousand, five hundred forty-three".