12391393 has 4 divisors (see below), whose sum is σ = 14161600. Its totient is φ = 10621188.

The previous prime is 12391373. The next prime is 12391399. The reversal of 12391393 is 39319321.

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.

It is a cyclic number.

It is not a de Polignac number, because 12391393 - 2⁵ = 12391361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12391399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885093 + ... + 885106.

It is an arithmetic number, because the mean of its divisors is an integer number (3540400).

Almost surely, 2^12391393 is an apocalyptic number.

It is an amenable number.

12391393 is a deficient number, since it is larger than the sum of its proper divisors (1770207).

12391393 is an equidigital number, since it uses as much as digits as its factorization.

12391393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770206.

The product of its digits is 4374, while the sum is 31.

The square root of 12391393 is about 3520.1410483104. The cubic root of 12391393 is about 231.4053401863.

The spelling of 12391393 in words is "twelve million, three hundred ninety-one thousand, three hundred ninety-three".