9899797899 has 8 divisors (see below), whose sum is σ = 13256382672. Its totient is φ = 6571539200.

The previous prime is 9899797891. The next prime is 9899797907. The reversal of 9899797899 is 9987979989.

9899797899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9899797891) and next prime (9899797907).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9899797899 - 2³ = 9899797891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9899797891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7080702 + ... + 7082099.

It is an arithmetic number, because the mean of its divisors is an integer number (1657047834).

Almost surely, 2^9899797899 is an apocalyptic number.

9899797899 is a deficient number, since it is larger than the sum of its proper divisors (3356584773).

9899797899 is a wasteful number, since it uses less digits than its factorization.

9899797899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14163037.

The product of its digits is 1666598976, while the sum is 84.

The square root of 9899797899 is about 99497.7281097413. The cubic root of 9899797899 is about 2147.2145575672.

The spelling of 9899797899 in words is "nine billion, eight hundred ninety-nine million, seven hundred ninety-seven thousand, eight hundred ninety-nine".