9889698969889 has 2 divisors, whose sum is σ = 9889698969890. Its totient is φ = 9889698969888.

The previous prime is 9889698969869. The next prime is 9889698969907.

9889698969889 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., 9364701632400 + 524997337489 = 3060180^2 + 724567^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 9889698969889 - 2⁹ = 9889698969377 is a prime.

It is a super-2 number, since 2×9889698969889² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9889698969791 and 9889698969800.

It is not a weakly prime, because it can be changed into another prime (9889698969869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4944849484944 + 4944849484945.

It is an arithmetic number, because the mean of its divisors is an integer number (4944849484945).

Almost surely, 2^{9889698969889} is an apocalyptic number.

It is an amenable number.

9889698969889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9889698969889 is an equidigital number, since it uses as much as digits as its factorization.

9889698969889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 626913312768, while the sum is 106.

The spelling of 9889698969889 in words is "nine trillion, eight hundred eighty-nine billion, six hundred ninety-eight million, nine hundred sixty-nine thousand, eight hundred eighty-nine".