12391343 has 2 divisors, whose sum is σ = 12391344. Its totient is φ = 12391342.

The previous prime is 12391339. The next prime is 12391361. The reversal of 12391343 is 34319321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12391343 - 2² = 12391339 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12391303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6195671 + 6195672.

It is an arithmetic number, because the mean of its divisors is an integer number (6195672).

Almost surely, 2^12391343 is an apocalyptic number.

12391343 is a deficient number, since it is larger than the sum of its proper divisors (1).

12391343 is an equidigital number, since it uses as much as digits as its factorization.

12391343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 26.

The square root of 12391343 is about 3520.1339463151. The cubic root of 12391343 is about 231.4050289411.

The spelling of 12391343 in words is "twelve million, three hundred ninety-one thousand, three hundred forty-three".