1312311043 has 2 divisors, whose sum is σ = 1312311044. Its totient is φ = 1312311042.

The previous prime is 1312311029. The next prime is 1312311047. The reversal of 1312311043 is 3401132131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312311043 - 2²⁹ = 775440131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312311043.

It is not a weakly prime, because it can be changed into another prime (1312311047) 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, 656155521 + 656155522.

It is an arithmetic number, because the mean of its divisors is an integer number (656155522).

Almost surely, 2^1312311043 is an apocalyptic number.

1312311043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312311043 is an equidigital number, since it uses as much as digits as its factorization.

1312311043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1312311043 is about 36225.8339172475. The cubic root of 1312311043 is about 1094.8272401774.

Adding to 1312311043 its reverse (3401132131), we get a palindrome (4713443174).

The spelling of 1312311043 in words is "one billion, three hundred twelve million, three hundred eleven thousand, forty-three".