9994547320523 has 2 divisors, whose sum is σ = 9994547320524. Its totient is φ = 9994547320522.

The previous prime is 9994547320519. The next prime is 9994547320529. The reversal of 9994547320523 is 3250237454999.

It is a weak prime.

It is an emirp because it is prime and its reverse (3250237454999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9994547320523 - 2² = 9994547320519 is a prime.

It is a super-2 number, since 2×9994547320523² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9994547320529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4997273660261 + 4997273660262.

It is an arithmetic number, because the mean of its divisors is an integer number (4997273660262).

Almost surely, 2^{9994547320523} is an apocalyptic number.

9994547320523 is a deficient number, since it is larger than the sum of its proper divisors (1).

9994547320523 is an equidigital number, since it uses as much as digits as its factorization.

9994547320523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73483200, while the sum is 62.

The spelling of 9994547320523 in words is "nine trillion, nine hundred ninety-four billion, five hundred forty-seven million, three hundred twenty thousand, five hundred twenty-three".