13657 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75631 = 53 ⋅1427.
It is a cyclic number.
It is a Duffinian number.
13657 is a lucky number.
It is a plaindrome in base 16.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 13657.
213657 is an apocalyptic number.
It is an amenable number.
13657 is an equidigital number, since it uses as much as digits as its factorization.
13657 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1958.
The square root of 13657 is about 116.8631678503. The cubic root of 13657 is about 23.9029646830.
The spelling of 13657 in words is "thirteen thousand, six hundred fifty-seven".