1312023031889 has 2 divisors, whose sum is σ = 1312023031890. Its totient is φ = 1312023031888.

The previous prime is 1312023031871. The next prime is 1312023031937. The reversal of 1312023031889 is 9881303202131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1236081451264 + 75941580625 = 1111792^2 + 275575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312023031889 - 2⁴⁰ = 212511404113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312023031829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656011515944 + 656011515945.

It is an arithmetic number, because the mean of its divisors is an integer number (656011515945).

Almost surely, 2^{1312023031889} is an apocalyptic number.

It is an amenable number.

1312023031889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312023031889 is an equidigital number, since it uses as much as digits as its factorization.

1312023031889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 1312023031889 in words is "one trillion, three hundred twelve billion, twenty-three million, thirty-one thousand, eight hundred eighty-nine".