9889779889 has 16 divisors (see below), whose sum is σ = 11398968000. Its totient is φ = 8485801920.

The previous prime is 9889779857. The next prime is 9889779923.

9889779889 is nontrivially palindromic in base 10.

9889779889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9889779889 - 2⁵ = 9889779857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9889779829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31734 + ... + 144175.

It is an arithmetic number, because the mean of its divisors is an integer number (712435500).

Almost surely, 2^9889779889 is an apocalyptic number.

It is an amenable number.

9889779889 is a deficient number, since it is larger than the sum of its proper divisors (1509188111).

9889779889 is a wasteful number, since it uses less digits than its factorization.

9889779889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176208.

The product of its digits is 1316818944, while the sum is 82.

The square root of 9889779889 is about 99447.3724590047. The cubic root of 9889779889 is about 2146.4900284034.

The spelling of 9889779889 in words is "nine billion, eight hundred eighty-nine million, seven hundred seventy-nine thousand, eight hundred eighty-nine".