1311143023 has 2 divisors, whose sum is σ = 1311143024. Its totient is φ = 1311143022.

The previous prime is 1311142997. The next prime is 1311143027. The reversal of 1311143023 is 3203411131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311143023 - 2¹³ = 1311134831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311143027) 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, 655571511 + 655571512.

It is an arithmetic number, because the mean of its divisors is an integer number (655571512).

Almost surely, 2^1311143023 is an apocalyptic number.

1311143023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311143023 is an equidigital number, since it uses as much as digits as its factorization.

1311143023 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 1311143023 is about 36209.7089604432. The cubic root of 1311143023 is about 1094.5023274469.

Adding to 1311143023 its reverse (3203411131), we get a palindrome (4514554154).

The spelling of 1311143023 in words is "one billion, three hundred eleven million, one hundred forty-three thousand, twenty-three".