9889999889 has 8 divisors (see below), whose sum is σ = 12330389568. Its totient is φ = 7706493360.

The previous prime is 9889999877. The next prime is 9889999919.

9889999889 is nontrivially palindromic in base 10.

9889999889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9889999889 - 2⁸ = 9889999633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9889999889.

It is not an unprimeable number, because it can be changed into a prime (9889990889) 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 in 7 ways as a sum of consecutive naturals, for example, 64220702 + ... + 64220855.

It is an arithmetic number, because the mean of its divisors is an integer number (1541298696).

Almost surely, 2^9889999889 is an apocalyptic number.

It is an amenable number.

9889999889 is a deficient number, since it is larger than the sum of its proper divisors (2440389679).

9889999889 is a wasteful number, since it uses less digits than its factorization.

9889999889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128441575.

The product of its digits is 2176782336, while the sum is 86.

The square root of 9889999889 is about 99448.4785655366. The cubic root of 9889999889 is about 2146.5059446425.

The spelling of 9889999889 in words is "nine billion, eight hundred eighty-nine million, nine hundred ninety-nine thousand, eight hundred eighty-nine".