11787 has 4 divisors (see below), whose sum is σ = 15720. Its totient is φ = 7856.

The previous prime is 11783. The next prime is 11789. The reversal of 11787 is 78711.

11787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78711 = 3 ⋅26237.

It is a cyclic number.

It is not a de Polignac number, because 11787 - 2² = 11783 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (11783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962 + ... + 1967.

It is an arithmetic number, because the mean of its divisors is an integer number (3930).

2¹¹⁷⁸⁷ is an apocalyptic number.

11787 is a deficient number, since it is larger than the sum of its proper divisors (3933).

11787 is an equidigital number, since it uses as much as digits as its factorization.

11787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932.

The product of its digits is 392, while the sum is 24.

The square root of 11787 is about 108.5679510721. The cubic root of 11787 is about 22.7580175420.

Adding to 11787 its sum of digits (24), we get a palindrome (11811).

The spelling of 11787 in words is "eleven thousand, seven hundred eighty-seven".