13688397 has 12 divisors (see below), whose sum is σ = 19878144. Its totient is φ = 9076680.

The previous prime is 13688393. The next prime is 13688399. The reversal of 13688397 is 79388631.

It is a happy number.

It is not a de Polignac number, because 13688397 - 2² = 13688393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13688393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2263 + ... + 5700.

It is an arithmetic number, because the mean of its divisors is an integer number (1656512).

Almost surely, 2^13688397 is an apocalyptic number.

It is an amenable number.

13688397 is a deficient number, since it is larger than the sum of its proper divisors (6189747).

13688397 is a wasteful number, since it uses less digits than its factorization.

13688397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8160 (or 8157 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 13688397 is about 3699.7833720368. The cubic root of 13688397 is about 239.2126804406.

The spelling of 13688397 in words is "thirteen million, six hundred eighty-eight thousand, three hundred ninety-seven".