11965589 has 8 divisors (see below), whose sum is σ = 12752640. Its totient is φ = 11200816.

The previous prime is 11965579. The next prime is 11965607. The reversal of 11965589 is 98556911.

11965589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11965589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11965519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4454 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (1594080).

Almost surely, 2^11965589 is an apocalyptic number.

It is an amenable number.

11965589 is a deficient number, since it is larger than the sum of its proper divisors (787051).

11965589 is a wasteful number, since it uses less digits than its factorization.

11965589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11139.

The product of its digits is 97200, while the sum is 44.

The square root of 11965589 is about 3459.1312493168. The cubic root of 11965589 is about 228.7238014329.

The spelling of 11965589 in words is "eleven million, nine hundred sixty-five thousand, five hundred eighty-nine".