12381717739 has 2 divisors, whose sum is σ = 12381717740. Its totient is φ = 12381717738.

The previous prime is 12381717721. The next prime is 12381717767. The reversal of 12381717739 is 93771718321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12381717739 - 2¹¹ = 12381715691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12381717692 and 12381717701.

It is not a weakly prime, because it can be changed into another prime (12381717239) 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, 6190858869 + 6190858870.

It is an arithmetic number, because the mean of its divisors is an integer number (6190858870).

Almost surely, 2^12381717739 is an apocalyptic number.

12381717739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12381717739 is an equidigital number, since it uses as much as digits as its factorization.

12381717739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 49.

The spelling of 12381717739 in words is "twelve billion, three hundred eighty-one million, seven hundred seventeen thousand, seven hundred thirty-nine".