68109543 has 12 divisors (see below), whose sum is σ = 98626320. Its totient is φ = 45292896.

The previous prime is 68109529. The next prime is 68109553. The reversal of 68109543 is 34590186.

68109543 is a `hidden beast` number, since 6 + 8 + 109 + 543 = 666.

It is not a de Polignac number, because 68109543 - 2⁶ = 68109479 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68109498 and 68109507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68109553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5571 + ... + 12932.

It is an arithmetic number, because the mean of its divisors is an integer number (8218860).

Almost surely, 2^68109543 is an apocalyptic number.

68109543 is a deficient number, since it is larger than the sum of its proper divisors (30516777).

68109543 is a wasteful number, since it uses less digits than its factorization.

68109543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18918 (or 18915 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 68109543 is about 8252.8505984296. The cubic root of 68109543 is about 408.3845674803.

The spelling of 68109543 in words is "sixty-eight million, one hundred nine thousand, five hundred forty-three".