8888849989 has 2 divisors, whose sum is σ = 8888849990. Its totient is φ = 8888849988.

The previous prime is 8888849987. The next prime is 8888850077. The reversal of 8888849989 is 9899488888.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7675512100 + 1213337889 = 87610^2 + 34833^2 .

It is a cyclic number.

It is not a de Polignac number, because 8888849989 - 2¹ = 8888849987 is a prime.

Together with 8888849987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8888849987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4444424994 + 4444424995.

It is an arithmetic number, because the mean of its divisors is an integer number (4444424995).

Almost surely, 2^8888849989 is an apocalyptic number.

It is an amenable number.

8888849989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8888849989 is an equidigital number, since it uses as much as digits as its factorization.

8888849989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 764411904, while the sum is 79.

The square root of 8888849989 is about 94280.6978601665. The cubic root of 8888849989 is about 2071.4853155232.

The spelling of 8888849989 in words is "eight billion, eight hundred eighty-eight million, eight hundred forty-nine thousand, nine hundred eighty-nine".