8999 has 2 divisors, whose sum is σ = 9000. Its totient is φ = 8998.
The previous prime is 8971. The next prime is 9001. The reversal of 8999 is 9998.
8999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 8999 - 212 = 4903 is a prime.
Together with 9001, it forms a pair of twin primes.
It is a Chen prime.
8999 is a modest number, since divided by 99 gives 89 as remainder.
It is a plaindrome in base 10 and base 15.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (8929) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4499 + 4500.
It is an arithmetic number, because the mean of its divisors is an integer number (4500).
28999 is an apocalyptic number.
8999 is a deficient number, since it is larger than the sum of its proper divisors (1).
8999 is an equidigital number, since it uses as much as digits as its factorization.
8999 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 5832, while the sum is 35.
The square root of 8999 is about 94.8630591959. The cubic root of 8999 is about 20.8000678006.
Subtracting 8999 from its reverse (9998), we obtain a palindrome (999).
The spelling of 8999 in words is "eight thousand, nine hundred ninety-nine".
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