9988211 has 2 divisors, whose sum is σ = 9988212. Its totient is φ = 9988210.

The previous prime is 9988177. The next prime is 9988213. The reversal of 9988211 is 1128899.

It is a strong prime.

It is an emirp because it is prime and its reverse (1128899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9988211 is a prime.

It is a super-3 number, since 3×9988211³ (a number of 22 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 9988213, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (9988213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994105 + 4994106.

It is an arithmetic number, because the mean of its divisors is an integer number (4994106).

Almost surely, 2^9988211 is an apocalyptic number.

9988211 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988211 is an equidigital number, since it uses as much as digits as its factorization.

9988211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 38.

The square root of 9988211 is about 3160.4131059088. The cubic root of 9988211 is about 215.3587736101.

The spelling of 9988211 in words is "nine million, nine hundred eighty-eight thousand, two hundred eleven".