8999899 has 2 divisors, whose sum is σ = 8999900. Its totient is φ = 8999898.

The previous prime is 8999897. The next prime is 8999927. The reversal of 8999899 is 9989998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8999899 - 2¹ = 8999897 is a prime.

Together with 8999897, it forms a pair of twin primes.

8999899 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8999897) 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, 4499949 + 4499950.

It is an arithmetic number, because the mean of its divisors is an integer number (4499950).

Almost surely, 2^8999899 is an apocalyptic number.

8999899 is a deficient number, since it is larger than the sum of its proper divisors (1).

8999899 is an equidigital number, since it uses as much as digits as its factorization.

8999899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 61.

The square root of 8999899 is about 2999.9831666194. The cubic root of 8999899 is about 208.0076041968.

Subtracting 8999899 from its reverse (9989998), we obtain a palindrome (990099).

It can be divided in two parts, 899989 and 9, that added together give a palindrome (899998).

The spelling of 8999899 in words is "eight million, nine hundred ninety-nine thousand, eight hundred ninety-nine".