12971393 has 4 divisors (see below), whose sum is σ = 12979200. Its totient is φ = 12963588.

The previous prime is 12971369. The next prime is 12971411. The reversal of 12971393 is 39317921.

12971393 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 39317921 = 953 ⋅41257.

It is a cyclic number.

It is not a de Polignac number, because 12971393 - 2⁸ = 12971137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12971093) 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, 305 + ... + 5102.

It is an arithmetic number, because the mean of its divisors is an integer number (3244800).

Almost surely, 2^12971393 is an apocalyptic number.

It is an amenable number.

12971393 is a deficient number, since it is larger than the sum of its proper divisors (7807).

12971393 is an equidigital number, since it uses as much as digits as its factorization.

12971393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7806.

The product of its digits is 10206, while the sum is 35.

The square root of 12971393 is about 3601.5820135046. The cubic root of 12971393 is about 234.9608686918.

The spelling of 12971393 in words is "twelve million, nine hundred seventy-one thousand, three hundred ninety-three".