11689589 has 4 divisors (see below), whose sum is σ = 12197856. Its totient is φ = 11181324.

The previous prime is 11689583. The next prime is 11689597. The reversal of 11689589 is 98598611.

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: 98598611 = 331 ⋅297881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11689589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11689583) 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, 254099 + ... + 254144.

It is an arithmetic number, because the mean of its divisors is an integer number (3049464).

Almost surely, 2^11689589 is an apocalyptic number.

It is an amenable number.

11689589 is a deficient number, since it is larger than the sum of its proper divisors (508267).

11689589 is an equidigital number, since it uses as much as digits as its factorization.

11689589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508266.

The product of its digits is 155520, while the sum is 47.

The square root of 11689589 is about 3419.0040947621. The cubic root of 11689589 is about 226.9515120872.

The spelling of 11689589 in words is "eleven million, six hundred eighty-nine thousand, five hundred eighty-nine".