68563643 has 2 divisors, whose sum is σ = 68563644. Its totient is φ = 68563642.

The previous prime is 68563619. The next prime is 68563657. The reversal of 68563643 is 34636586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68563643 - 2²⁶ = 1454779 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68563643.

It is not a weakly prime, because it can be changed into another prime (68563673) 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, 34281821 + 34281822.

It is an arithmetic number, because the mean of its divisors is an integer number (34281822).

Almost surely, 2^68563643 is an apocalyptic number.

68563643 is a deficient number, since it is larger than the sum of its proper divisors (1).

68563643 is an equidigital number, since it uses as much as digits as its factorization.

68563643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 41.

The square root of 68563643 is about 8280.3166002273. The cubic root of 68563643 is about 409.2901518538.

The spelling of 68563643 in words is "sixty-eight million, five hundred sixty-three thousand, six hundred forty-three".