9923544453239 has 2 divisors, whose sum is σ = 9923544453240. Its totient is φ = 9923544453238.

The previous prime is 9923544453211. The next prime is 9923544453257. The reversal of 9923544453239 is 9323544453299.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9923544453239 is a prime.

It is a super-2 number, since 2×9923544453239² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9923544453259) 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, 4961772226619 + 4961772226620.

It is an arithmetic number, because the mean of its divisors is an integer number (4961772226620).

Almost surely, 2^{9923544453239} is an apocalyptic number.

9923544453239 is a deficient number, since it is larger than the sum of its proper divisors (1).

9923544453239 is an equidigital number, since it uses as much as digits as its factorization.

9923544453239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125971200, while the sum is 62.

The spelling of 9923544453239 in words is "nine trillion, nine hundred twenty-three billion, five hundred forty-four million, four hundred fifty-three thousand, two hundred thirty-nine".