12391893 has 8 divisors (see below), whose sum is σ = 18358400. Its totient is φ = 8261244.

The previous prime is 12391867. The next prime is 12391913. The reversal of 12391893 is 39819321.

12391893 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12391893 - 2⁸ = 12391637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12391493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229453 + ... + 229506.

It is an arithmetic number, because the mean of its divisors is an integer number (2294800).

Almost surely, 2^12391893 is an apocalyptic number.

It is an amenable number.

12391893 is a deficient number, since it is larger than the sum of its proper divisors (5966507).

12391893 is an equidigital number, since it uses as much as digits as its factorization.

12391893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458968 (or 458962 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 12391893 is about 3520.2120674755. The cubic root of 12391893 is about 231.4084525916.

The spelling of 12391893 in words is "twelve million, three hundred ninety-one thousand, eight hundred ninety-three".