68443549 has 2 divisors, whose sum is σ = 68443550. Its totient is φ = 68443548.

The previous prime is 68443541. The next prime is 68443577. The reversal of 68443549 is 94534486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67732900 + 710649 = 8230^2 + 843^2 .

It is a cyclic number.

It is not a de Polignac number, because 68443549 - 2³ = 68443541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68443541) 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 as a sum of consecutive naturals, namely, 34221774 + 34221775.

It is an arithmetic number, because the mean of its divisors is an integer number (34221775).

Almost surely, 2^68443549 is an apocalyptic number.

It is an amenable number.

68443549 is a deficient number, since it is larger than the sum of its proper divisors (1).

68443549 is an equidigital number, since it uses as much as digits as its factorization.

68443549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 43.

The square root of 68443549 is about 8273.0616460897. The cubic root of 68443549 is about 409.0510454520.

The spelling of 68443549 in words is "sixty-eight million, four hundred forty-three thousand, five hundred forty-nine".