12730765939 has 4 divisors (see below), whose sum is σ = 13141435840. Its totient is φ = 12320096040.

The previous prime is 12730765867. The next prime is 12730765961. The reversal of 12730765939 is 93956703721.

12730765939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93956703721 = 103 ⋅912201007.

It is a cyclic number.

It is not a de Polignac number, because 12730765939 - 2¹³ = 12730757747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12730765739) 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 in 3 ways as a sum of consecutive naturals, for example, 205334904 + ... + 205334965.

It is an arithmetic number, because the mean of its divisors is an integer number (3285358960).

Almost surely, 2^12730765939 is an apocalyptic number.

12730765939 is a deficient number, since it is larger than the sum of its proper divisors (410669901).

12730765939 is an equidigital number, since it uses as much as digits as its factorization.

12730765939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410669900.

The product of its (nonzero) digits is 2143260, while the sum is 52.

The spelling of 12730765939 in words is "twelve billion, seven hundred thirty million, seven hundred sixty-five thousand, nine hundred thirty-nine".