12391783819 has 2 divisors, whose sum is σ = 12391783820. Its totient is φ = 12391783818.

The previous prime is 12391783783. The next prime is 12391783861. The reversal of 12391783819 is 91838719321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12391783819 - 2¹¹ = 12391781771 is a prime.

It is a super-2 number, since 2×12391783819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12391783889) 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, 6195891909 + 6195891910.

It is an arithmetic number, because the mean of its divisors is an integer number (6195891910).

Almost surely, 2^12391783819 is an apocalyptic number.

12391783819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12391783819 is an equidigital number, since it uses as much as digits as its factorization.

12391783819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 52.

The spelling of 12391783819 in words is "twelve billion, three hundred ninety-one million, seven hundred eighty-three thousand, eight hundred nineteen".