8909999099 has 16 divisors (see below), whose sum is σ = 9620292000. Its totient is φ = 8226385920.

The previous prime is 8909999093. The next prime is 8909999143. The reversal of 8909999099 is 9909999098.

It is not a de Polignac number, because 8909999099 - 2²⁸ = 8641563643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8909999093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91067 + ... + 161595.

It is an arithmetic number, because the mean of its divisors is an integer number (601268250).

Almost surely, 2^8909999099 is an apocalyptic number.

8909999099 is a deficient number, since it is larger than the sum of its proper divisors (710292901).

8909999099 is a wasteful number, since it uses less digits than its factorization.

8909999099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70718.

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

The square root of 8909999099 is about 94392.7915627036. The cubic root of 8909999099 is about 2073.1268991235.

Subtracting 8909999099 from its reverse (9909999098), we obtain a palindrome (999999999).

The spelling of 8909999099 in words is "eight billion, nine hundred nine million, nine hundred ninety-nine thousand, ninety-nine".