12919947877 has 2 divisors, whose sum is σ = 12919947878. Its totient is φ = 12919947876.

The previous prime is 12919947869. The next prime is 12919947889. The reversal of 12919947877 is 77874991921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9324026721 + 3595921156 = 96561^2 + 59966^2 .

It is a cyclic number.

It is not a de Polignac number, because 12919947877 - 2³ = 12919947869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12919947857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459973938 + 6459973939.

It is an arithmetic number, because the mean of its divisors is an integer number (6459973939).

Almost surely, 2^12919947877 is an apocalyptic number.

It is an amenable number.

12919947877 is a deficient number, since it is larger than the sum of its proper divisors (1).

12919947877 is an equidigital number, since it uses as much as digits as its factorization.

12919947877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 64.

The spelling of 12919947877 in words is "twelve billion, nine hundred nineteen million, nine hundred forty-seven thousand, eight hundred seventy-seven".