12939393937 has 2 divisors, whose sum is σ = 12939393938. Its totient is φ = 12939393936.

The previous prime is 12939393919. The next prime is 12939393953. The reversal of 12939393937 is 73939393921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9401047681 + 3538346256 = 96959^2 + 59484^2 .

It is a cyclic number.

It is not a de Polignac number, because 12939393937 - 2³¹ = 10791910289 is a prime.

It is not a weakly prime, because it can be changed into another prime (12939393917) 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, 6469696968 + 6469696969.

It is an arithmetic number, because the mean of its divisors is an integer number (6469696969).

Almost surely, 2^12939393937 is an apocalyptic number.

It is an amenable number.

12939393937 is a deficient number, since it is larger than the sum of its proper divisors (1).

12939393937 is an equidigital number, since it uses as much as digits as its factorization.

12939393937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7440174, while the sum is 58.

The spelling of 12939393937 in words is "twelve billion, nine hundred thirty-nine million, three hundred ninety-three thousand, nine hundred thirty-seven".