1312131047 has 2 divisors, whose sum is σ = 1312131048. Its totient is φ = 1312131046.

The previous prime is 1312131011. The next prime is 1312131091. The reversal of 1312131047 is 7401312131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312131047 - 2⁶ = 1312130983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312131647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656065523 + 656065524.

It is an arithmetic number, because the mean of its divisors is an integer number (656065524).

Almost surely, 2^1312131047 is an apocalyptic number.

1312131047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312131047 is an equidigital number, since it uses as much as digits as its factorization.

1312131047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1312131047 is about 36223.3494724052. The cubic root of 1312131047 is about 1094.7771825493. Note that the first 3 decimals are identical.

Adding to 1312131047 its reverse (7401312131), we get a palindrome (8713443178).

The spelling of 1312131047 in words is "one billion, three hundred twelve million, one hundred thirty-one thousand, forty-seven".