1311313043 has 2 divisors, whose sum is σ = 1311313044. Its totient is φ = 1311313042.

The previous prime is 1311313033. The next prime is 1311313057. The reversal of 1311313043 is 3403131131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311313043 - 2⁶ = 1311312979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311313033) 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, 655656521 + 655656522.

It is an arithmetic number, because the mean of its divisors is an integer number (655656522).

Almost surely, 2^1311313043 is an apocalyptic number.

1311313043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311313043 is an equidigital number, since it uses as much as digits as its factorization.

1311313043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1311313043 is about 36212.0565972163. The cubic root of 1311313043 is about 1094.5496345775.

Adding to 1311313043 its reverse (3403131131), we get a palindrome (4714444174).

The spelling of 1311313043 in words is "one billion, three hundred eleven million, three hundred thirteen thousand, forty-three".