11983 has 4 divisors (see below), whose sum is σ = 12528. Its totient is φ = 11440.

The previous prime is 11981. The next prime is 11987. The reversal of 11983 is 38911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38911 = 167 ⋅233.

It is a cyclic number.

It is not a de Polignac number, because 11983 - 2¹ = 11981 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 (11981) 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, 238 + ... + 283.

It is an arithmetic number, because the mean of its divisors is an integer number (3132).

2¹¹⁹⁸³ is an apocalyptic number.

11983 is a deficient number, since it is larger than the sum of its proper divisors (545).

11983 is an equidigital number, since it uses as much as digits as its factorization.

11983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544.

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

The square root of 11983 is about 109.4668899714. The cubic root of 11983 is about 22.8834685517.

It can be divided in two parts, 119 and 83, that added together give a palindrome (202).

The spelling of 11983 in words is "eleven thousand, nine hundred eighty-three".