8039999999 has 4 divisors (see below), whose sum is σ = 8040232200. Its totient is φ = 8039767800.

The previous prime is 8039999993. The next prime is 8040000047. The reversal of 8039999999 is 9999999308.

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 8039999999 - 2²⁰ = 8038951423 is a prime.

It is a Duffinian number.

8039999999 is a modest number, since divided by 99999 gives 80399 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8039999993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52577 + ... + 137274.

It is an arithmetic number, because the mean of its divisors is an integer number (2010058050).

Almost surely, 2^8039999999 is an apocalyptic number.

8039999999 is a deficient number, since it is larger than the sum of its proper divisors (232201).

8039999999 is a wasteful number, since it uses less digits than its factorization.

8039999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232200.

The product of its (nonzero) digits is 114791256, while the sum is 74.

The square root of 8039999999 is about 89666.0470802633. The cubic root of 8039999999 is about 2003.3277930756.

The spelling of 8039999999 in words is "eight billion, thirty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".