9889690969889 has 2 divisors, whose sum is σ = 9889690969890. Its totient is φ = 9889690969888.

The previous prime is 9889690969867. The next prime is 9889690969909.

9889690969889 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7661934720400 + 2227756249489 = 2768020^2 + 1492567^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 9889690969889 - 2²⁰ = 9889689921313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9889690969795 and 9889690969804.

It is not a weakly prime, because it can be changed into another prime (9889690960889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4944845484944 + 4944845484945.

It is an arithmetic number, because the mean of its divisors is an integer number (4944845484945).

Almost surely, 2^{9889690969889} is an apocalyptic number.

It is an amenable number.

9889690969889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9889690969889 is an equidigital number, since it uses as much as digits as its factorization.

9889690969889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78364164096, while the sum is 98.

The spelling of 9889690969889 in words is "nine trillion, eight hundred eighty-nine billion, six hundred ninety million, nine hundred sixty-nine thousand, eight hundred eighty-nine".