11100091 has 4 divisors (see below), whose sum is σ = 11265832. Its totient is φ = 10934352.

The previous prime is 11100079. The next prime is 11100097. The reversal of 11100091 is 19000111.

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 11100091 - 2⁵ = 11100059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11100097) 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, 82770 + ... + 82903.

It is an arithmetic number, because the mean of its divisors is an integer number (2816458).

Almost surely, 2^11100091 is an apocalyptic number.

11100091 is a deficient number, since it is larger than the sum of its proper divisors (165741).

11100091 is an equidigital number, since it uses as much as digits as its factorization.

11100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165740.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 11100091 is about 3331.6799065937. The cubic root of 11100091 is about 223.0705200363.

The spelling of 11100091 in words is "eleven million, one hundred thousand, ninety-one".