11987713 has 4 divisors (see below), whose sum is σ = 12002260. Its totient is φ = 11973168.

The previous prime is 11987687. The next prime is 11987719. The reversal of 11987713 is 31778911.

11987713 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.

It can be written as a sum of positive squares in 2 ways, for example, as 9591409 + 2396304 = 3097^2 + 1548^2 .

It is a cyclic number.

It is not a de Polignac number, because 11987713 - 2⁵ = 11987681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11987719) 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, 5958 + ... + 7711.

It is an arithmetic number, because the mean of its divisors is an integer number (3000565).

Almost surely, 2^11987713 is an apocalyptic number.

It is an amenable number.

11987713 is a deficient number, since it is larger than the sum of its proper divisors (14547).

11987713 is an equidigital number, since it uses as much as digits as its factorization.

11987713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14546.

The product of its digits is 10584, while the sum is 37.

The square root of 11987713 is about 3462.3276852430. The cubic root of 11987713 is about 228.8646823600.

It can be divided in two parts, 1198 and 7713, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 11987713 in words is "eleven million, nine hundred eighty-seven thousand, seven hundred thirteen".