9091000091 has 8 divisors (see below), whose sum is σ = 9576430800. Its totient is φ = 8606265120.

The previous prime is 9091000081. The next prime is 9091000103. The reversal of 9091000091 is 1900001909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9091000091 - 2³⁰ = 8017258267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9091000021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146996 + ... + 199473.

It is an arithmetic number, because the mean of its divisors is an integer number (1197053850).

Almost surely, 2^9091000091 is an apocalyptic number.

9091000091 is a deficient number, since it is larger than the sum of its proper divisors (485430709).

9091000091 is a wasteful number, since it uses less digits than its factorization.

9091000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347869.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 9091000091 is about 95346.7361318677. The cubic root of 9091000091 is about 2087.0709862439.

The spelling of 9091000091 in words is "nine billion, ninety-one million, ninety-one", and thus it is an aban number and an uban number.