11389 has 4 divisors (see below), whose sum is σ = 13024. Its totient is φ = 9756.

The previous prime is 11383. The next prime is 11393. The reversal of 11389 is 98311.

11389 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98311 = 17 ⋅5783.

It is a cyclic number.

It is not a de Polignac number, because 11389 - 2⁷ = 11261 is a prime.

It is a Duffinian number.

11389 is a lucky number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11383) 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, 807 + ... + 820.

It is an arithmetic number, because the mean of its divisors is an integer number (3256).

2¹¹³⁸⁹ is an apocalyptic number.

It is an amenable number.

11389 is a deficient number, since it is larger than the sum of its proper divisors (1635).

11389 is an equidigital number, since it uses as much as digits as its factorization.

11389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634.

The product of its digits is 216, while the sum is 22.

The square root of 11389 is about 106.7192578685. The cubic root of 11389 is about 22.4989299903.

Adding to 11389 its sum of digits (22), we get a palindrome (11411).

It can be divided in two parts, 113 and 89, that added together give a palindrome (202).

The spelling of 11389 in words is "eleven thousand, three hundred eighty-nine".