12340423 has 2 divisors, whose sum is σ = 12340424. Its totient is φ = 12340422.

The previous prime is 12340421. The next prime is 12340429. The reversal of 12340423 is 32404321.

It is a weak prime.

It is an emirp because it is prime and its reverse (32404321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12340423 - 2¹ = 12340421 is a prime.

Together with 12340421, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12340423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12340421) 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 as a sum of consecutive naturals, namely, 6170211 + 6170212.

It is an arithmetic number, because the mean of its divisors is an integer number (6170212).

Almost surely, 2^12340423 is an apocalyptic number.

12340423 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340423 is an equidigital number, since it uses as much as digits as its factorization.

12340423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 12340423 is about 3512.8938213388. The cubic root of 12340423 is about 231.0876212891.

Adding to 12340423 its reverse (32404321), we get a palindrome (44744744).

The spelling of 12340423 in words is "twelve million, three hundred forty thousand, four hundred twenty-three".