13118687 has 4 divisors (see below), whose sum is σ = 13397856. Its totient is φ = 12839520.

The previous prime is 13118669. The next prime is 13118711. The reversal of 13118687 is 78681131.

13118687 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: 78681131 = 31 ⋅2538101.

It is a cyclic number.

It is not a de Polignac number, because 13118687 - 2⁸ = 13118431 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 (13118087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139514 + ... + 139607.

It is an arithmetic number, because the mean of its divisors is an integer number (3349464).

Almost surely, 2^13118687 is an apocalyptic number.

13118687 is a deficient number, since it is larger than the sum of its proper divisors (279169).

13118687 is an equidigital number, since it uses as much as digits as its factorization.

13118687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279168.

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

The square root of 13118687 is about 3621.9728049780. The cubic root of 13118687 is about 235.8468735194.

The spelling of 13118687 in words is "thirteen million, one hundred eighteen thousand, six hundred eighty-seven".