9899611 has 2 divisors, whose sum is σ = 9899612. Its totient is φ = 9899610.

The previous prime is 9899599. The next prime is 9899621. The reversal of 9899611 is 1169989.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9899611 is a prime.

It is not a weakly prime, because it can be changed into another prime (9899621) 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, 4949805 + 4949806.

It is an arithmetic number, because the mean of its divisors is an integer number (4949806).

Almost surely, 2^9899611 is an apocalyptic number.

9899611 is a deficient number, since it is larger than the sum of its proper divisors (1).

9899611 is an equidigital number, since it uses as much as digits as its factorization.

9899611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 43.

The square root of 9899611 is about 3146.3647277453. The cubic root of 9899611 is about 214.7201045009.

The spelling of 9899611 in words is "nine million, eight hundred ninety-nine thousand, six hundred eleven".