11783861 has 4 divisors (see below), whose sum is σ = 12006252. Its totient is φ = 11561472.

The previous prime is 11783833. The next prime is 11783869. The reversal of 11783861 is 16838711.

11783861 is digitally balanced in base 3, 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: 16838711 = 89 ⋅189199.

It can be written as a sum of positive squares in 2 ways, for example, as 8151025 + 3632836 = 2855^2 + 1906^2 .

It is a cyclic number.

It is not a de Polignac number, because 11783861 - 2¹⁸ = 11521717 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 (11783869) 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, 111116 + ... + 111221.

It is an arithmetic number, because the mean of its divisors is an integer number (3001563).

Almost surely, 2^11783861 is an apocalyptic number.

It is an amenable number.

11783861 is a deficient number, since it is larger than the sum of its proper divisors (222391).

11783861 is an equidigital number, since it uses as much as digits as its factorization.

11783861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222390.

The product of its digits is 8064, while the sum is 35.

The square root of 11783861 is about 3432.7628814120. The cubic root of 11783861 is about 227.5599713087.

The spelling of 11783861 in words is "eleven million, seven hundred eighty-three thousand, eight hundred sixty-one".