13667687 has 4 divisors (see below), whose sum is σ = 14910216. Its totient is φ = 12425160.

The previous prime is 13667659. The next prime is 13667699. The reversal of 13667687 is 78676631.

It is a happy number.

13667687 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 not a de Polignac number, because 13667687 - 2¹⁰ = 13666663 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 (13667627) 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, 621248 + ... + 621269.

It is an arithmetic number, because the mean of its divisors is an integer number (3727554).

Almost surely, 2^13667687 is an apocalyptic number.

13667687 is a deficient number, since it is larger than the sum of its proper divisors (1242529).

13667687 is a wasteful number, since it uses less digits than its factorization.

13667687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242528.

The product of its digits is 254016, while the sum is 44.

The square root of 13667687 is about 3696.9835000984. The cubic root of 13667687 is about 239.0919797926.

The spelling of 13667687 in words is "thirteen million, six hundred sixty-seven thousand, six hundred eighty-seven".