11659 has 4 divisors (see below), whose sum is σ = 11880. Its totient is φ = 11440.

The previous prime is 11657. The next prime is 11677. The reversal of 11659 is 95611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95611 = 23 ⋅4157.

It is a cyclic number.

It is not a de Polignac number, because 11659 - 2¹ = 11657 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

11659 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11657) 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, 24 + ... + 154.

It is an arithmetic number, because the mean of its divisors is an integer number (2970).

2¹¹⁶⁵⁹ is an apocalyptic number.

11659 is a deficient number, since it is larger than the sum of its proper divisors (221).

11659 is an equidigital number, since it uses as much as digits as its factorization.

11659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220.

The product of its digits is 270, while the sum is 22.

The square root of 11659 is about 107.9768493706. The cubic root of 11659 is about 22.6753378973.

The spelling of 11659 in words is "eleven thousand, six hundred fifty-nine".