12340045517 has 2 divisors, whose sum is σ = 12340045518. Its totient is φ = 12340045516.

The previous prime is 12340045513. The next prime is 12340045541. The reversal of 12340045517 is 71554004321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12050331076 + 289714441 = 109774^2 + 17021^2 .

It is an emirp because it is prime and its reverse (71554004321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12340045517 - 2² = 12340045513 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12340045513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170022758 + 6170022759.

It is an arithmetic number, because the mean of its divisors is an integer number (6170022759).

Almost surely, 2^12340045517 is an apocalyptic number.

It is an amenable number.

12340045517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340045517 is an equidigital number, since it uses as much as digits as its factorization.

12340045517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 12340045517 its reverse (71554004321), we get a palindrome (83894049838).

The spelling of 12340045517 in words is "twelve billion, three hundred forty million, forty-five thousand, five hundred seventeen".