12340403239 has 2 divisors, whose sum is σ = 12340403240. Its totient is φ = 12340403238.

The previous prime is 12340403191. The next prime is 12340403261. The reversal of 12340403239 is 93230404321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12340403239 - 2⁷ = 12340403111 is a prime.

It is a super-2 number, since 2×12340403239² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12340403239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12340403939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170201619 + 6170201620.

It is an arithmetic number, because the mean of its divisors is an integer number (6170201620).

Almost surely, 2^12340403239 is an apocalyptic number.

12340403239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340403239 is an equidigital number, since it uses as much as digits as its factorization.

12340403239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 12340403239 in words is "twelve billion, three hundred forty million, four hundred three thousand, two hundred thirty-nine".