12944977937 has 2 divisors, whose sum is σ = 12944977938. Its totient is φ = 12944977936.

The previous prime is 12944977909. The next prime is 12944977949. The reversal of 12944977937 is 73977944921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11147981056 + 1796996881 = 105584^2 + 42391^2 .

It is an emirp because it is prime and its reverse (73977944921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12944977937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12944977937.

It is not a weakly prime, because it can be changed into another prime (12944977907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6472488968 + 6472488969.

It is an arithmetic number, because the mean of its divisors is an integer number (6472488969).

Almost surely, 2^12944977937 is an apocalyptic number.

It is an amenable number.

12944977937 is a deficient number, since it is larger than the sum of its proper divisors (1).

12944977937 is an equidigital number, since it uses as much as digits as its factorization.

12944977937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24004512, while the sum is 62.

The spelling of 12944977937 in words is "twelve billion, nine hundred forty-four million, nine hundred seventy-seven thousand, nine hundred thirty-seven".