9888882217 has 2 divisors, whose sum is σ = 9888882218. Its totient is φ = 9888882216.

The previous prime is 9888882193. The next prime is 9888882221. The reversal of 9888882217 is 7122888889.

9888882217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7628450281 + 2260431936 = 87341^2 + 47544^2 .

It is an emirp because it is prime and its reverse (7122888889) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9888882217 is a prime.

It is not a weakly prime, because it can be changed into another prime (9888882277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4944441108 + 4944441109.

It is an arithmetic number, because the mean of its divisors is an integer number (4944441109).

Almost surely, 2^9888882217 is an apocalyptic number.

It is an amenable number.

9888882217 is a deficient number, since it is larger than the sum of its proper divisors (1).

9888882217 is an equidigital number, since it uses as much as digits as its factorization.

9888882217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8257536, while the sum is 61.

The square root of 9888882217 is about 99442.8590548361. The cubic root of 9888882217 is about 2146.4250824922.

The spelling of 9888882217 in words is "nine billion, eight hundred eighty-eight million, eight hundred eighty-two thousand, two hundred seventeen".