9986111 has 2 divisors, whose sum is σ = 9986112. Its totient is φ = 9986110.

The previous prime is 9986069. The next prime is 9986113. The reversal of 9986111 is 1116899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9986111 is a prime.

Together with 9986113, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9986113) 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, 4993055 + 4993056.

It is an arithmetic number, because the mean of its divisors is an integer number (4993056).

Almost surely, 2^9986111 is an apocalyptic number.

9986111 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986111 is an equidigital number, since it uses as much as digits as its factorization.

9986111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 35.

The square root of 9986111 is about 3160.0808533960. The cubic root of 9986111 is about 215.3436796451.

It can be divided in two parts, 998 and 6111, that multiplied together give a triangular number (6098778 = T₃₄₉₂).

The spelling of 9986111 in words is "nine million, nine hundred eighty-six thousand, one hundred eleven".