9899599 has 2 divisors, whose sum is σ = 9899600. Its totient is φ = 9899598.

The previous prime is 9899597. The next prime is 9899611. The reversal of 9899599 is 9959989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9899599 - 2¹ = 9899597 is a prime.

Together with 9899597, 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 (9899597) 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, 4949799 + 4949800.

It is an arithmetic number, because the mean of its divisors is an integer number (4949800).

Almost surely, 2^9899599 is an apocalyptic number.

9899599 is a deficient number, since it is larger than the sum of its proper divisors (1).

9899599 is an equidigital number, since it uses as much as digits as its factorization.

9899599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2361960, while the sum is 58.

The square root of 9899599 is about 3146.3628207821. The cubic root of 9899599 is about 214.7200177419.

The spelling of 9899599 in words is "nine million, eight hundred ninety-nine thousand, five hundred ninety-nine".