12943806937 has 4 divisors (see below), whose sum is σ = 13089243060. Its totient is φ = 12798370816.

The previous prime is 12943806917. The next prime is 12943806947. The reversal of 12943806937 is 73960834921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73960834921 = 173 ⋅427519277.

It can be written as a sum of positive squares in 2 ways, for example, as 1209717961 + 11734088976 = 34781^2 + 108324^2 .

It is a cyclic number.

It is not a de Polignac number, because 12943806937 - 2¹¹ = 12943804889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12943806917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72717928 + ... + 72718105.

It is an arithmetic number, because the mean of its divisors is an integer number (3272310765).

Almost surely, 2^12943806937 is an apocalyptic number.

It is an amenable number.

12943806937 is a deficient number, since it is larger than the sum of its proper divisors (145436123).

12943806937 is an equidigital number, since it uses as much as digits as its factorization.

12943806937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145436122.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 12943806937 in words is "twelve billion, nine hundred forty-three million, eight hundred six thousand, nine hundred thirty-seven".