9909449099 has 16 divisors (see below), whose sum is σ = 11416253184. Its totient is φ = 8513076000.

The previous prime is 9909449083. The next prime is 9909449117.

9909449099 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9909449099 - 2⁴ = 9909449083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9909449299) 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, 214952 + ... + 256949.

It is an arithmetic number, because the mean of its divisors is an integer number (713515824).

Almost surely, 2^9909449099 is an apocalyptic number.

9909449099 is a deficient number, since it is larger than the sum of its proper divisors (1506804085).

9909449099 is a wasteful number, since it uses less digits than its factorization.

9909449099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472018.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 9909449099 is about 99546.2158949299. The cubic root of 9909449099 is about 2147.9120959320.

The spelling of 9909449099 in words is "nine billion, nine hundred nine million, four hundred forty-nine thousand, ninety-nine".