12322391 has 2 divisors, whose sum is σ = 12322392. Its totient is φ = 12322390.

The previous prime is 12322351. The next prime is 12322397. The reversal of 12322391 is 19322321.

12322391 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12322391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12322397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6161195 + 6161196.

It is an arithmetic number, because the mean of its divisors is an integer number (6161196).

Almost surely, 2^12322391 is an apocalyptic number.

12322391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12322391 is an equidigital number, since it uses as much as digits as its factorization.

12322391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 12322391 is about 3510.3263381059. The cubic root of 12322391 is about 230.9750102587.

The spelling of 12322391 in words is "twelve million, three hundred twenty-two thousand, three hundred ninety-one".