99933859871 has 4 divisors (see below), whose sum is σ = 99948923592. Its totient is φ = 99918796152.

The previous prime is 99933859853. The next prime is 99933859889. The reversal of 99933859871 is 17895833999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17895833999 = 419 ⋅42710821.

It is an interprime number because it is at equal distance from previous prime (99933859853) and next prime (99933859889).

It is a cyclic number.

It is not a de Polignac number, because 99933859871 - 2³⁰ = 98860118047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99933859795 and 99933859804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99933859841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7521905 + ... + 7535178.

It is an arithmetic number, because the mean of its divisors is an integer number (24987230898).

Almost surely, 2^99933859871 is an apocalyptic number.

99933859871 is a deficient number, since it is larger than the sum of its proper divisors (15063721).

99933859871 is a wasteful number, since it uses less digits than its factorization.

99933859871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15063720.

The product of its digits is 132269760, while the sum is 71.

The spelling of 99933859871 in words is "ninety-nine billion, nine hundred thirty-three million, eight hundred fifty-nine thousand, eight hundred seventy-one".