68545643 has 2 divisors, whose sum is σ = 68545644. Its totient is φ = 68545642.

The previous prime is 68545637. The next prime is 68545657. The reversal of 68545643 is 34654586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68545643 - 2⁴ = 68545627 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68545643.

It is not a weakly prime, because it can be changed into another prime (68545663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34272821 + 34272822.

It is an arithmetic number, because the mean of its divisors is an integer number (34272822).

Almost surely, 2^68545643 is an apocalyptic number.

68545643 is a deficient number, since it is larger than the sum of its proper divisors (1).

68545643 is an equidigital number, since it uses as much as digits as its factorization.

68545643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 41.

The square root of 68545643 is about 8279.2296139194. The cubic root of 68545643 is about 409.2543317641.

The spelling of 68545643 in words is "sixty-eight million, five hundred forty-five thousand, six hundred forty-three".