12331991939 has 2 divisors, whose sum is σ = 12331991940. Its totient is φ = 12331991938.

The previous prime is 12331991911. The next prime is 12331991953. The reversal of 12331991939 is 93919913321.

12331991939 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12331991939 is a prime.

It is not a weakly prime, because it can be changed into another prime (12331991909) 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, 6165995969 + 6165995970.

It is an arithmetic number, because the mean of its divisors is an integer number (6165995970).

Almost surely, 2^12331991939 is an apocalyptic number.

12331991939 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331991939 is an equidigital number, since it uses as much as digits as its factorization.

12331991939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 354294, while the sum is 50.

The spelling of 12331991939 in words is "twelve billion, three hundred thirty-one million, nine hundred ninety-one thousand, nine hundred thirty-nine".