9009190091 has 16 divisors (see below), whose sum is σ = 10259267328. Its totient is φ = 7831216800.

The previous prime is 9009190079. The next prime is 9009190117. The reversal of 9009190091 is 1900919009.

It is a happy number.

9009190091 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9009190091 - 2¹⁰ = 9009189067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9009190031) 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, 986456 + ... + 995546.

It is an arithmetic number, because the mean of its divisors is an integer number (641204208).

Almost surely, 2^9009190091 is an apocalyptic number.

9009190091 is a deficient number, since it is larger than the sum of its proper divisors (1250077237).

9009190091 is a wasteful number, since it uses less digits than its factorization.

9009190091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13042.

The product of its (nonzero) digits is 6561, while the sum is 38.

The square root of 9009190091 is about 94916.7534790355. The cubic root of 9009190091 is about 2080.7915881138.

The spelling of 9009190091 in words is "nine billion, nine million, one hundred ninety thousand, ninety-one".