9109920109 has 12 divisors (see below), whose sum is σ = 9780630076. Its totient is φ = 8478309312.

The previous prime is 9109920091. The next prime is 9109920163. The reversal of 9109920109 is 9010299019.

It can be written as a sum of positive squares in 2 ways, for example, as 6970580100 + 2139340009 = 83490^2 + 46253^2 .

It is not a de Polignac number, because 9109920109 - 2²⁵ = 9076365677 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9109920199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213144 + ... + 252289.

Almost surely, 2^9109920109 is an apocalyptic number.

It is an amenable number.

9109920109 is a deficient number, since it is larger than the sum of its proper divisors (670709967).

9109920109 is a wasteful number, since it uses less digits than its factorization.

9109920109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465516 (or 465493 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 9109920109 is about 95445.9014782720. The cubic root of 9109920109 is about 2088.5178405822.

The spelling of 9109920109 in words is "nine billion, one hundred nine million, nine hundred twenty thousand, one hundred nine".