13687923657 has 8 divisors (see below), whose sum is σ = 18255204576. Its totient is φ = 9122962592.

The previous prime is 13687923649. The next prime is 13687923661. The reversal of 13687923657 is 75632978631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13687923657 - 2³ = 13687923649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13687923597 and 13687923606.

It is not an unprimeable number, because it can be changed into a prime (13687923607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566148 + ... + 589829.

It is an arithmetic number, because the mean of its divisors is an integer number (2281900572).

Almost surely, 2^13687923657 is an apocalyptic number.

It is an amenable number.

13687923657 is a deficient number, since it is larger than the sum of its proper divisors (4567280919).

13687923657 is a wasteful number, since it uses less digits than its factorization.

13687923657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159927.

The product of its digits is 11430720, while the sum is 57.

The spelling of 13687923657 in words is "thirteen billion, six hundred eighty-seven million, nine hundred twenty-three thousand, six hundred fifty-seven".