1312320329989 has 2 divisors, whose sum is σ = 1312320329990. Its totient is φ = 1312320329988.

The previous prime is 1312320329951. The next prime is 1312320330011. The reversal of 1312320329989 is 9899230232131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 806574629025 + 505745700964 = 898095^2 + 711158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312320329989 - 2⁹ = 1312320329477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312320329389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656160164994 + 656160164995.

It is an arithmetic number, because the mean of its divisors is an integer number (656160164995).

Almost surely, 2^{1312320329989} is an apocalyptic number.

It is an amenable number.

1312320329989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312320329989 is an equidigital number, since it uses as much as digits as its factorization.

1312320329989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 1312320329989 in words is "one trillion, three hundred twelve billion, three hundred twenty million, three hundred twenty-nine thousand, nine hundred eighty-nine".