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11089 = 13853

11089 has 4 divisors (see below), whose sum is σ = 11956. Its totient is φ = 10224.

The previous prime is 11087. The next prime is 11093. The reversal of 11089 is 98011.

11089 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1089 + 10000 = 33^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 11089 - 21 = 11087 is a prime.

It is a Duffinian number.

11089 is a lucky number.

It is a plaindrome in base 15.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (11083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414 + ... + 439.

It is an arithmetic number, because the mean of its divisors is an integer number (2989).

It is an amenable number.

11089 is a deficient number, since it is larger than the sum of its proper divisors (867).

11089 is an equidigital number, since it uses as much as digits as its factorization.

11089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 11089 is about 105.3043208990. The cubic root of 11089 is about 22.2996199336.

The spelling of 11089 in words is "eleven thousand, eighty-nine".

Divisors: 1 13 853 11089