12788393 has 4 divisors (see below), whose sum is σ = 12798720. Its totient is φ = 12778068.

The previous prime is 12788389. The next prime is 12788401. The reversal of 12788393 is 39388721.

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: 39388721 = 263 ⋅149767.

It is a cyclic number.

It is not a de Polignac number, because 12788393 - 2² = 12788389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12788393.

It is not an unprimeable number, because it can be changed into a prime (12788353) 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, 3005 + ... + 5882.

It is an arithmetic number, because the mean of its divisors is an integer number (3199680).

Almost surely, 2^12788393 is an apocalyptic number.

It is an amenable number.

12788393 is a deficient number, since it is larger than the sum of its proper divisors (10327).

12788393 is an equidigital number, since it uses as much as digits as its factorization.

12788393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10326.

The product of its digits is 72576, while the sum is 41.

The square root of 12788393 is about 3576.0862685344. The cubic root of 12788393 is about 233.8506912702.

The spelling of 12788393 in words is "twelve million, seven hundred eighty-eight thousand, three hundred ninety-three".