13687679 has 4 divisors (see below), whose sum is σ = 13795584. Its totient is φ = 13579776.

The previous prime is 13687649. The next prime is 13687693. The reversal of 13687679 is 97678631.

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 13687679 - 2⁸ = 13687423 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 (13687649) 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, 53762 + ... + 54015.

It is an arithmetic number, because the mean of its divisors is an integer number (3448896).

Almost surely, 2^13687679 is an apocalyptic number.

13687679 is a deficient number, since it is larger than the sum of its proper divisors (107905).

13687679 is a wasteful number, since it uses less digits than its factorization.

13687679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107904.

The product of its digits is 381024, while the sum is 47.

The square root of 13687679 is about 3699.6863380562. The cubic root of 13687679 is about 239.2084978786.

The spelling of 13687679 in words is "thirteen million, six hundred eighty-seven thousand, six hundred seventy-nine".