9101009091 has 4 divisors (see below), whose sum is σ = 12134678792. Its totient is φ = 6067339392.

The previous prime is 9101009089. The next prime is 9101009111. The reversal of 9101009091 is 1909001019.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 9101009091 - 2¹ = 9101009089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9101002091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516834846 + ... + 1516834851.

It is an arithmetic number, because the mean of its divisors is an integer number (3033669698).

Almost surely, 2^9101009091 is an apocalyptic number.

9101009091 is a deficient number, since it is larger than the sum of its proper divisors (3033669701).

9101009091 is a wasteful number, since it uses less digits than its factorization.

9101009091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033669700.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 9101009091 is about 95399.2090690484. The cubic root of 9101009091 is about 2087.8366457489.

The spelling of 9101009091 in words is "nine billion, one hundred one million, nine thousand, ninety-one".