1326897988697 has 2 divisors, whose sum is σ = 1326897988698. Its totient is φ = 1326897988696.

The previous prime is 1326897988667. The next prime is 1326897988709. The reversal of 1326897988697 is 7968897986231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108326778441 + 218571210256 = 1052771^2 + 467516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326897988697 - 2²² = 1326893794393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1326897988667) 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, 663448994348 + 663448994349.

It is an arithmetic number, because the mean of its divisors is an integer number (663448994349).

Almost surely, 2^{1326897988697} is an apocalyptic number.

It is an amenable number.

1326897988697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326897988697 is an equidigital number, since it uses as much as digits as its factorization.

1326897988697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3950456832, while the sum is 83.

The spelling of 1326897988697 in words is "one trillion, three hundred twenty-six billion, eight hundred ninety-seven million, nine hundred eighty-eight thousand, six hundred ninety-seven".