9689889871 has 4 divisors (see below), whose sum is σ = 9690720592. Its totient is φ = 9689059152.

The previous prime is 9689889829. The next prime is 9689889893. The reversal of 9689889871 is 1789889869.

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 9689889871 - 2¹⁹ = 9689365583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9689889794 and 9689889803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9689889371) 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, 397611 + ... + 421276.

It is an arithmetic number, because the mean of its divisors is an integer number (2422680148).

Almost surely, 2^9689889871 is an apocalyptic number.

9689889871 is a deficient number, since it is larger than the sum of its proper divisors (830721).

9689889871 is a wasteful number, since it uses less digits than its factorization.

9689889871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830720.

The product of its digits is 125411328, while the sum is 73.

The square root of 9689889871 is about 98437.2382333027. The cubic root of 9689889871 is about 2131.9300301202.

The spelling of 9689889871 in words is "nine billion, six hundred eighty-nine million, eight hundred eighty-nine thousand, eight hundred seventy-one".