12391469 has 2 divisors, whose sum is σ = 12391470. Its totient is φ = 12391468.

The previous prime is 12391451. The next prime is 12391481. The reversal of 12391469 is 96419321.

12391469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12075625 + 315844 = 3475^2 + 562^2 .

It is an emirp because it is prime and its reverse (96419321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12391469 is a prime.

It is a super-2 number, since 2×12391469² = 307097007955922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12391429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6195734 + 6195735.

It is an arithmetic number, because the mean of its divisors is an integer number (6195735).

Almost surely, 2^12391469 is an apocalyptic number.

It is an amenable number.

12391469 is a deficient number, since it is larger than the sum of its proper divisors (1).

12391469 is an equidigital number, since it uses as much as digits as its factorization.

12391469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 12391469 is about 3520.1518433159. The cubic root of 12391469 is about 231.4058132773.

The spelling of 12391469 in words is "twelve million, three hundred ninety-one thousand, four hundred sixty-nine".