1297427238673 has 2 divisors, whose sum is σ = 1297427238674. Its totient is φ = 1297427238672.

The previous prime is 1297427238631. The next prime is 1297427238799. The reversal of 1297427238673 is 3768327247921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011134824704 + 286292413969 = 1005552^2 + 535063^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297427238673 - 2⁹ = 1297427238161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297427218673) 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, 648713619336 + 648713619337.

It is an arithmetic number, because the mean of its divisors is an integer number (648713619337).

Almost surely, 2^{1297427238673} is an apocalyptic number.

It is an amenable number.

1297427238673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297427238673 is an equidigital number, since it uses as much as digits as its factorization.

1297427238673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42674688, while the sum is 61.

The spelling of 1297427238673 in words is "one trillion, two hundred ninety-seven billion, four hundred twenty-seven million, two hundred thirty-eight thousand, six hundred seventy-three".