9727216643 has 2 divisors, whose sum is σ = 9727216644. Its totient is φ = 9727216642.

The previous prime is 9727216637. The next prime is 9727216651. The reversal of 9727216643 is 3466127279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9727216643 - 2¹⁸ = 9726954499 is a prime.

It is not a weakly prime, because it can be changed into another prime (9727216613) 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, 4863608321 + 4863608322.

It is an arithmetic number, because the mean of its divisors is an integer number (4863608322).

Almost surely, 2^9727216643 is an apocalyptic number.

9727216643 is a deficient number, since it is larger than the sum of its proper divisors (1).

9727216643 is an equidigital number, since it uses as much as digits as its factorization.

9727216643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 47.

The square root of 9727216643 is about 98626.6528023739. The cubic root of 9727216643 is about 2134.6640172445.

The spelling of 9727216643 in words is "nine billion, seven hundred twenty-seven million, two hundred sixteen thousand, six hundred forty-three".