12165723847 has 2 divisors, whose sum is σ = 12165723848. Its totient is φ = 12165723846.

The previous prime is 12165723761. The next prime is 12165723877. The reversal of 12165723847 is 74832756121.

12165723847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (74832756121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12165723847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12165723797 and 12165723806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12165723877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082861923 + 6082861924.

It is an arithmetic number, because the mean of its divisors is an integer number (6082861924).

Almost surely, 2^12165723847 is an apocalyptic number.

12165723847 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165723847 is an equidigital number, since it uses as much as digits as its factorization.

12165723847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The spelling of 12165723847 in words is "twelve billion, one hundred sixty-five million, seven hundred twenty-three thousand, eight hundred forty-seven".