9968909138189 has 2 divisors, whose sum is σ = 9968909138190. Its totient is φ = 9968909138188.

The previous prime is 9968909138183. The next prime is 9968909138269. The reversal of 9968909138189 is 9818319098699.

It is a happy number.

It is an a-pointer prime, because the next prime (9968909138269) can be obtained adding 9968909138189 to its sum of digits (80).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9755596326025 + 213312812164 = 3123395^2 + 461858^2 .

It is an emirp because it is prime and its reverse (9818319098699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9968909138189 - 2⁴ = 9968909138173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9968909138183) 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, 4984454569094 + 4984454569095.

It is an arithmetic number, because the mean of its divisors is an integer number (4984454569095).

Almost surely, 2^{9968909138189} is an apocalyptic number.

It is an amenable number.

9968909138189 is a deficient number, since it is larger than the sum of its proper divisors (1).

9968909138189 is an equidigital number, since it uses as much as digits as its factorization.

9968909138189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544195584, while the sum is 80.

The spelling of 9968909138189 in words is "nine trillion, nine hundred sixty-eight billion, nine hundred nine million, one hundred thirty-eight thousand, one hundred eighty-nine".