9999573423839 has 4 divisors (see below), whose sum is σ = 10000384497360. Its totient is φ = 9998762350320.

The previous prime is 9999573423781. The next prime is 9999573423859. The reversal of 9999573423839 is 9383243759999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9999573423839 - 2²⁰ = 9999572375263 is a prime.

It is a super-3 number, since 3×9999573423839³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999573423859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405518267 + ... + 405542924.

It is an arithmetic number, because the mean of its divisors is an integer number (2500096124340).

Almost surely, 2^{9999573423839} is an apocalyptic number.

9999573423839 is a deficient number, since it is larger than the sum of its proper divisors (811073521).

9999573423839 is a wasteful number, since it uses less digits than its factorization.

9999573423839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811073520.

The product of its digits is 3571283520, while the sum is 80.

The spelling of 9999573423839 in words is "nine trillion, nine hundred ninety-nine billion, five hundred seventy-three million, four hundred twenty-three thousand, eight hundred thirty-nine".