13117687 has 4 divisors (see below), whose sum is σ = 14310216. Its totient is φ = 11925160.

The previous prime is 13117679. The next prime is 13117691. The reversal of 13117687 is 78671131.

13117687 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 is a cyclic number.

It is not a de Polignac number, because 13117687 - 2³ = 13117679 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 (13117697) 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, 596248 + ... + 596269.

It is an arithmetic number, because the mean of its divisors is an integer number (3577554).

Almost surely, 2^13117687 is an apocalyptic number.

13117687 is a deficient number, since it is larger than the sum of its proper divisors (1192529).

13117687 is a wasteful number, since it uses less digits than its factorization.

13117687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192528.

The product of its digits is 7056, while the sum is 34.

The square root of 13117687 is about 3621.8347560318. The cubic root of 13117687 is about 235.8408807228.

It can be divided in two parts, 1311 and 7687, that added together give a palindrome (8998).

The spelling of 13117687 in words is "thirteen million, one hundred seventeen thousand, six hundred eighty-seven".