11189091 has 4 divisors (see below), whose sum is σ = 14918792. Its totient is φ = 7459392.

The previous prime is 11189069. The next prime is 11189093. The reversal of 11189091 is 19098111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19098111 = 3 ⋅6366037.

It is not a de Polignac number, because 11189091 - 2⁶ = 11189027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11189093) 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, 1864846 + ... + 1864851.

It is an arithmetic number, because the mean of its divisors is an integer number (3729698).

Almost surely, 2^11189091 is an apocalyptic number.

11189091 is a deficient number, since it is larger than the sum of its proper divisors (3729701).

11189091 is an equidigital number, since it uses as much as digits as its factorization.

11189091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729700.

The product of its (nonzero) digits is 648, while the sum is 30.

The square root of 11189091 is about 3345.0098654563. The cubic root of 11189091 is about 223.6651232850.

The spelling of 11189091 in words is "eleven million, one hundred eighty-nine thousand, ninety-one".