1323131984399 has 2 divisors, whose sum is σ = 1323131984400. Its totient is φ = 1323131984398.

The previous prime is 1323131984387. The next prime is 1323131984509. The reversal of 1323131984399 is 9934891313231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323131984399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323131984359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661565992199 + 661565992200.

It is an arithmetic number, because the mean of its divisors is an integer number (661565992200).

Almost surely, 2^{1323131984399} is an apocalyptic number.

1323131984399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323131984399 is an equidigital number, since it uses as much as digits as its factorization.

1323131984399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 56.

The spelling of 1323131984399 in words is "one trillion, three hundred twenty-three billion, one hundred thirty-one million, nine hundred eighty-four thousand, three hundred ninety-nine".