12397 has 12 divisors (see below), whose sum is σ = 16416. Its totient is φ = 9240.

The previous prime is 12391. The next prime is 12401. The reversal of 12397 is 79321.

12397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12397 - 2⁷ = 12269 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7 and base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528 + ... + 550.

It is an arithmetic number, because the mean of its divisors is an integer number (1368).

2¹²³⁹⁷ is an apocalyptic number.

It is an amenable number.

12397 is a deficient number, since it is larger than the sum of its proper divisors (4019).

12397 is a wasteful number, since it uses less digits than its factorization.

12397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48 (or 41 counting only the distinct ones).

The product of its digits is 378, while the sum is 22.

The square root of 12397 is about 111.3418160441. The cubic root of 12397 is about 23.1440237906.

The spelling of 12397 in words is "twelve thousand, three hundred ninety-seven".