8989297891 has 12 divisors (see below), whose sum is σ = 10600188312. Its totient is φ = 7599559968.

The previous prime is 8989297853. The next prime is 8989297901. The reversal of 8989297891 is 1987929898.

It is not a de Polignac number, because 8989297891 - 2⁷ = 8989297763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8989297891.

It is not an unprimeable number, because it can be changed into a prime (8989294891) 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 11 ways as a sum of consecutive naturals, for example, 1252965 + ... + 1260118.

It is an arithmetic number, because the mean of its divisors is an integer number (883349026).

Almost surely, 2^8989297891 is an apocalyptic number.

8989297891 is a deficient number, since it is larger than the sum of its proper divisors (1610890421).

8989297891 is a wasteful number, since it uses less digits than its factorization.

8989297891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513170 (or 2513163 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 70.

The square root of 8989297891 is about 94811.9079599182. The cubic root of 8989297891 is about 2079.2590040356.

The spelling of 8989297891 in words is "eight billion, nine hundred eighty-nine million, two hundred ninety-seven thousand, eight hundred ninety-one".