9990099899 has 16 divisors (see below), whose sum is σ = 11043381888. Its totient is φ = 8979503232.

The previous prime is 9990099877. The next prime is 9990099907. The reversal of 9990099899 is 9989900999.

It is a cyclic number.

It is not a de Polignac number, because 9990099899 - 2⁸ = 9990099643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9990099199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78869 + ... + 161865.

It is an arithmetic number, because the mean of its divisors is an integer number (690211368).

Almost surely, 2^9990099899 is an apocalyptic number.

9990099899 is a deficient number, since it is larger than the sum of its proper divisors (1053281989).

9990099899 is a wasteful number, since it uses less digits than its factorization.

9990099899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83254.

The product of its (nonzero) digits is 38263752, while the sum is 71.

The square root of 9990099899 is about 99950.4872374317. The cubic root of 9990099899 is about 2153.7234845791.

The spelling of 9990099899 in words is "nine billion, nine hundred ninety million, ninety-nine thousand, eight hundred ninety-nine".