9889907686 has 8 divisors (see below), whose sum is σ = 15086300040. Its totient is φ = 4861141008.

The previous prime is 9889907653. The next prime is 9889907717. The reversal of 9889907686 is 6867099889.

It is a happy number.

9889907686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 41906271 + ... + 41906506.

It is an arithmetic number, because the mean of its divisors is an integer number (1885787505).

Almost surely, 2^9889907686 is an apocalyptic number.

9889907686 is a deficient number, since it is larger than the sum of its proper divisors (5196392354).

9889907686 is a wasteful number, since it uses less digits than its factorization.

9889907686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83812838.

The product of its (nonzero) digits is 94058496, while the sum is 70.

The square root of 9889907686 is about 99448.0149927589. The cubic root of 9889907686 is about 2146.4992741030.

The spelling of 9889907686 in words is "nine billion, eight hundred eighty-nine million, nine hundred seven thousand, six hundred eighty-six".