13688997 has 8 divisors (see below), whose sum is σ = 20859456. Its totient is φ = 7822272.

The previous prime is 13688989. The next prime is 13689017. The reversal of 13688997 is 79988631.

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

It is not a de Polignac number, because 13688997 - 2³ = 13688989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13688897) 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, 325908 + ... + 325949.

It is an arithmetic number, because the mean of its divisors is an integer number (2607432).

Almost surely, 2^13688997 is an apocalyptic number.

It is an amenable number.

13688997 is a deficient number, since it is larger than the sum of its proper divisors (7170459).

13688997 is an equidigital number, since it uses as much as digits as its factorization.

13688997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651867.

The product of its digits is 653184, while the sum is 51.

The square root of 13688997 is about 3699.8644569768. The cubic root of 13688997 is about 239.2161755056.

The spelling of 13688997 in words is "thirteen million, six hundred eighty-eight thousand, nine hundred ninety-seven".