11659989 has 8 divisors (see below), whose sum is σ = 16960032. Its totient is φ = 7066640.

The previous prime is 11659987. The next prime is 11660003. The reversal of 11659989 is 98995611.

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

It is a cyclic number.

It is not a de Polignac number, because 11659989 - 2¹ = 11659987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11659981) 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, 176634 + ... + 176699.

It is an arithmetic number, because the mean of its divisors is an integer number (2120004).

Almost surely, 2^11659989 is an apocalyptic number.

It is an amenable number.

11659989 is a deficient number, since it is larger than the sum of its proper divisors (5300043).

11659989 is a wasteful number, since it uses less digits than its factorization.

11659989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353347.

The product of its digits is 174960, while the sum is 48.

The square root of 11659989 is about 3414.6726050970. The cubic root of 11659989 is about 226.7597904075.

The spelling of 11659989 in words is "eleven million, six hundred fifty-nine thousand, nine hundred eighty-nine".