11180891 has 4 divisors (see below), whose sum is σ = 11206800. Its totient is φ = 11154984.

The previous prime is 11180881. The next prime is 11180927. The reversal of 11180891 is 19808111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19808111 = 17 ⋅1165183.

It is a cyclic number.

It is not a de Polignac number, because 11180891 - 2²² = 6986587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11180821) 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, 12296 + ... + 13173.

It is an arithmetic number, because the mean of its divisors is an integer number (2801700).

Almost surely, 2^11180891 is an apocalyptic number.

11180891 is a deficient number, since it is larger than the sum of its proper divisors (25909).

11180891 is an equidigital number, since it uses as much as digits as its factorization.

11180891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25908.

The product of its (nonzero) digits is 576, while the sum is 29.

The square root of 11180891 is about 3343.7839344072. The cubic root of 11180891 is about 223.6104717730.

The spelling of 11180891 in words is "eleven million, one hundred eighty thousand, eight hundred ninety-one".