13281897 has 4 divisors (see below), whose sum is σ = 17709200. Its totient is φ = 8854596.

The previous prime is 13281889. The next prime is 13281901. The reversal of 13281897 is 79818231.

13281897 is digitally balanced in base 2, 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: 79818231 = 3 ⋅26606077.

It is not a de Polignac number, because 13281897 - 2³ = 13281889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13281497) 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, 2213647 + ... + 2213652.

It is an arithmetic number, because the mean of its divisors is an integer number (4427300).

Almost surely, 2^13281897 is an apocalyptic number.

It is an amenable number.

13281897 is a deficient number, since it is larger than the sum of its proper divisors (4427303).

13281897 is an equidigital number, since it uses as much as digits as its factorization.

13281897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427302.

The product of its digits is 24192, while the sum is 39.

The square root of 13281897 is about 3644.4337008649. The cubic root of 13281897 is about 236.8209047716.

The spelling of 13281897 in words is "thirteen million, two hundred eighty-one thousand, eight hundred ninety-seven".