1323208936909 has 2 divisors, whose sum is σ = 1323208936910. Its totient is φ = 1323208936908.

The previous prime is 1323208936877. The next prime is 1323208936919. The reversal of 1323208936909 is 9096398023231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1315230517225 + 7978419684 = 1146835^2 + 89322^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323208936909 - 2⁵ = 1323208936877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1323208936909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323208936919) 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, 661604468454 + 661604468455.

It is an arithmetic number, because the mean of its divisors is an integer number (661604468455).

Almost surely, 2^{1323208936909} is an apocalyptic number.

It is an amenable number.

1323208936909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323208936909 is an equidigital number, since it uses as much as digits as its factorization.

1323208936909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 55.

The spelling of 1323208936909 in words is "one trillion, three hundred twenty-three billion, two hundred eight million, nine hundred thirty-six thousand, nine hundred nine".