8989889897 has 4 divisors (see below), whose sum is σ = 8994722436. Its totient is φ = 8985057360.

The previous prime is 8989889879. The next prime is 8989889899. The reversal of 8989889897 is 7989889898.

8989889897 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 361152016 + 8628737881 = 19004^2 + 92891^2 .

It is a cyclic number.

It is not a de Polignac number, because 8989889897 - 2³² = 4694922601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8989889899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2413478 + ... + 2417199.

It is an arithmetic number, because the mean of its divisors is an integer number (2248680609).

Almost surely, 2^8989889897 is an apocalyptic number.

It is an amenable number.

8989889897 is a deficient number, since it is larger than the sum of its proper divisors (4832539).

8989889897 is a wasteful number, since it uses less digits than its factorization.

8989889897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832538.

The product of its digits is 1504935936, while the sum is 83.

The square root of 8989889897 is about 94815.0299108744. The cubic root of 8989889897 is about 2079.3046474514.

Subtracting from 8989889897 its reverse (7989889898), we obtain a palindrome (999999999).

The spelling of 8989889897 in words is "eight billion, nine hundred eighty-nine million, eight hundred eighty-nine thousand, eight hundred ninety-seven".