67864543 has 2 divisors, whose sum is σ = 67864544. Its totient is φ = 67864542.

The previous prime is 67864541. The next prime is 67864567. The reversal of 67864543 is 34546876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67864543 - 2¹ = 67864541 is a prime.

Together with 67864541, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 67864543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67864541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33932271 + 33932272.

It is an arithmetic number, because the mean of its divisors is an integer number (33932272).

Almost surely, 2^67864543 is an apocalyptic number.

67864543 is a deficient number, since it is larger than the sum of its proper divisors (1).

67864543 is an equidigital number, since it uses as much as digits as its factorization.

67864543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 43.

The square root of 67864543 is about 8237.9938698690. The cubic root of 67864543 is about 407.8943061315.

The spelling of 67864543 in words is "sixty-seven million, eight hundred sixty-four thousand, five hundred forty-three".