9988109 has 2 divisors, whose sum is σ = 9988110. Its totient is φ = 9988108.

The previous prime is 9988073. The next prime is 9988127. The reversal of 9988109 is 9018899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9132484 + 855625 = 3022^2 + 925^2 .

It is an emirp because it is prime and its reverse (9018899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9988109 - 2⁸ = 9987853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9988109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9988309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994054 + 4994055.

It is an arithmetic number, because the mean of its divisors is an integer number (4994055).

Almost surely, 2^9988109 is an apocalyptic number.

It is an amenable number.

9988109 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988109 is an equidigital number, since it uses as much as digits as its factorization.

9988109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 9988109 is about 3160.3969687367. The cubic root of 9988109 is about 215.3580405236.

The spelling of 9988109 in words is "nine million, nine hundred eighty-eight thousand, one hundred nine".