12391783757 has 2 divisors, whose sum is σ = 12391783758. Its totient is φ = 12391783756.

The previous prime is 12391783753. The next prime is 12391783777. The reversal of 12391783757 is 75738719321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12364105636 + 27678121 = 111194^2 + 5261^2 .

It is a cyclic number.

It is not a de Polignac number, because 12391783757 - 2² = 12391783753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12391783699 and 12391783708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12391783753) 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, 6195891878 + 6195891879.

It is an arithmetic number, because the mean of its divisors is an integer number (6195891879).

Almost surely, 2^12391783757 is an apocalyptic number.

It is an amenable number.

12391783757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12391783757 is an equidigital number, since it uses as much as digits as its factorization.

12391783757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 53.

The spelling of 12391783757 in words is "twelve billion, three hundred ninety-one million, seven hundred eighty-three thousand, seven hundred fifty-seven".