91112011 has 4 divisors (see below), whose sum is σ = 95907400. Its totient is φ = 86316624.

The previous prime is 91111949. The next prime is 91112017. The reversal of 91112011 is 11021119.

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

It is a cyclic number.

It is not a de Polignac number, because 91112011 - 2⁹ = 91111499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91112017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397666 + ... + 2397703.

It is an arithmetic number, because the mean of its divisors is an integer number (23976850).

Almost surely, 2^91112011 is an apocalyptic number.

91112011 is a deficient number, since it is larger than the sum of its proper divisors (4795389).

91112011 is a wasteful number, since it uses less digits than its factorization.

91112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795388.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 91112011 is about 9545.2611802926. The cubic root of 91112011 is about 449.9786179141.

The spelling of 91112011 in words is "ninety-one million, one hundred twelve thousand, eleven".