1312131309847 has 2 divisors, whose sum is σ = 1312131309848. Its totient is φ = 1312131309846.

The previous prime is 1312131309829. The next prime is 1312131309859. The reversal of 1312131309847 is 7489031312131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312131309847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312131309887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656065654923 + 656065654924.

It is an arithmetic number, because the mean of its divisors is an integer number (656065654924).

Almost surely, 2^{1312131309847} is an apocalyptic number.

1312131309847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312131309847 is an equidigital number, since it uses as much as digits as its factorization.

1312131309847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 1312131309847 in words is "one trillion, three hundred twelve billion, one hundred thirty-one million, three hundred nine thousand, eight hundred forty-seven".