67986543 has 4 divisors (see below), whose sum is σ = 90648728. Its totient is φ = 45324360.

The previous prime is 67986539. The next prime is 67986557. The reversal of 67986543 is 34568976.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 67986543 - 2² = 67986539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67986492 and 67986501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67986533) 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 3 ways as a sum of consecutive naturals, for example, 11331088 + ... + 11331093.

It is an arithmetic number, because the mean of its divisors is an integer number (22662182).

Almost surely, 2^67986543 is an apocalyptic number.

67986543 is a deficient number, since it is larger than the sum of its proper divisors (22662185).

67986543 is a wasteful number, since it uses less digits than its factorization.

67986543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22662184.

The product of its digits is 1088640, while the sum is 48.

The square root of 67986543 is about 8245.3952603862. The cubic root of 67986543 is about 408.1385834974.

The spelling of 67986543 in words is "sixty-seven million, nine hundred eighty-six thousand, five hundred forty-three".