1312011443 has 2 divisors, whose sum is σ = 1312011444. Its totient is φ = 1312011442.

The previous prime is 1312011401. The next prime is 1312011469. The reversal of 1312011443 is 3441102131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312011443 - 2¹⁰ = 1312010419 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312031443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656005721 + 656005722.

It is an arithmetic number, because the mean of its divisors is an integer number (656005722).

Almost surely, 2^1312011443 is an apocalyptic number.

1312011443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312011443 is an equidigital number, since it uses as much as digits as its factorization.

1312011443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1312011443 is about 36221.6985106994. The cubic root of 1312011443 is about 1094.7439176532.

Adding to 1312011443 its reverse (3441102131), we get a palindrome (4753113574).

The spelling of 1312011443 in words is "one billion, three hundred twelve million, eleven thousand, four hundred forty-three".