13687688279 has 4 divisors (see below), whose sum is σ = 14159677560. Its totient is φ = 13215699000.

The previous prime is 13687688269. The next prime is 13687688291. The reversal of 13687688279 is 97288678631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97288678631 = 61 ⋅1594896371.

It is a cyclic number.

It is not a de Polignac number, because 13687688279 - 2¹² = 13687684183 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 (13687688239) 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, 235994597 + ... + 235994654.

It is an arithmetic number, because the mean of its divisors is an integer number (3539919390).

Almost surely, 2^13687688279 is an apocalyptic number.

13687688279 is a deficient number, since it is larger than the sum of its proper divisors (471989281).

13687688279 is an equidigital number, since it uses as much as digits as its factorization.

13687688279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471989280.

The product of its digits is 48771072, while the sum is 65.

The spelling of 13687688279 in words is "thirteen billion, six hundred eighty-seven million, six hundred eighty-eight thousand, two hundred seventy-nine".