8989889899 has 2 divisors, whose sum is σ = 8989889900. Its totient is φ = 8989889898.

The previous prime is 8989889879. The next prime is 8989889929. The reversal of 8989889899 is 9989889898.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8989889899 is a prime.

It is a super-2 number, since 2×8989889899² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8989889849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4494944949 + 4494944950.

It is an arithmetic number, because the mean of its divisors is an integer number (4494944950).

Almost surely, 2^8989889899 is an apocalyptic number.

8989889899 is a deficient number, since it is larger than the sum of its proper divisors (1).

8989889899 is an equidigital number, since it uses as much as digits as its factorization.

8989889899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1934917632, while the sum is 85.

The square root of 8989889899 is about 94815.0299214212. The cubic root of 8989889899 is about 2079.3046476056.

Subtracting 8989889899 from its reverse (9989889898), we obtain a palindrome (999999999).

The spelling of 8989889899 in words is "eight billion, nine hundred eighty-nine million, eight hundred eighty-nine thousand, eight hundred ninety-nine".