12347108457209 has 2 divisors, whose sum is σ = 12347108457210. Its totient is φ = 12347108457208.

The previous prime is 12347108457193. The next prime is 12347108457253. The reversal of 12347108457209 is 90275480174321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6964954374400 + 5382154082809 = 2639120^2 + 2319947^2 .

It is a cyclic number.

It is not a de Polignac number, because 12347108457209 - 2⁴ = 12347108457193 is a prime.

It is not a weakly prime, because it can be changed into another prime (12347108457269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6173554228604 + 6173554228605.

It is an arithmetic number, because the mean of its divisors is an integer number (6173554228605).

Almost surely, 2^{12347108457209} is an apocalyptic number.

It is an amenable number.

12347108457209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12347108457209 is an equidigital number, since it uses as much as digits as its factorization.

12347108457209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 12347108457209 in words is "twelve trillion, three hundred forty-seven billion, one hundred eight million, four hundred fifty-seven thousand, two hundred nine".