8989889849 has 2 divisors, whose sum is σ = 8989889850. Its totient is φ = 8989889848.

The previous prime is 8989889827. The next prime is 8989889873. The reversal of 8989889849 is 9489889898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8158605625 + 831284224 = 90325^2 + 28832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8989889849 is a prime.

It is not a weakly prime, because it can be changed into another prime (8989889879) 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 as a sum of consecutive naturals, namely, 4494944924 + 4494944925.

It is an arithmetic number, because the mean of its divisors is an integer number (4494944925).

Almost surely, 2^8989889849 is an apocalyptic number.

It is an amenable number.

8989889849 is a deficient number, since it is larger than the sum of its proper divisors (1).

8989889849 is an equidigital number, since it uses as much as digits as its factorization.

8989889849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 859963392, while the sum is 80.

The square root of 8989889849 is about 94815.0296577499. The cubic root of 8989889849 is about 2079.3046437507.

The spelling of 8989889849 in words is "eight billion, nine hundred eighty-nine million, eight hundred eighty-nine thousand, eight hundred forty-nine".