9993538999 has 4 divisors (see below), whose sum is σ = 9994102560. Its totient is φ = 9992975440.

The previous prime is 9993538993. The next prime is 9993539009. The reversal of 9993538999 is 9998353999.

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 9993538999 - 2³ = 9993538991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9993538991) 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 in 3 ways as a sum of consecutive naturals, for example, 254287 + ... + 290944.

It is an arithmetic number, because the mean of its divisors is an integer number (2498525640).

Almost surely, 2^9993538999 is an apocalyptic number.

9993538999 is a deficient number, since it is larger than the sum of its proper divisors (563561).

9993538999 is a wasteful number, since it uses less digits than its factorization.

9993538999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563560.

The product of its digits is 191318760, while the sum is 73.

The square root of 9993538999 is about 99967.6897752469. The cubic root of 9993538999 is about 2153.9705965777.

The spelling of 9993538999 in words is "nine billion, nine hundred ninety-three million, five hundred thirty-eight thousand, nine hundred ninety-nine".