9681171789 has 4 divisors (see below), whose sum is σ = 12908229056. Its totient is φ = 6454114524.

The previous prime is 9681171769. The next prime is 9681171811. The reversal of 9681171789 is 9871711869.

9681171789 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9681171789 - 2¹² = 9681167693 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 (9681171739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1613528629 + ... + 1613528634.

It is an arithmetic number, because the mean of its divisors is an integer number (3227057264).

Almost surely, 2^9681171789 is an apocalyptic number.

It is an amenable number.

9681171789 is a deficient number, since it is larger than the sum of its proper divisors (3227057267).

9681171789 is a wasteful number, since it uses less digits than its factorization.

9681171789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227057266.

The product of its digits is 1524096, while the sum is 57.

The square root of 9681171789 is about 98392.9458294648. The cubic root of 9681171789 is about 2131.2904659987.

The spelling of 9681171789 in words is "nine billion, six hundred eighty-one million, one hundred seventy-one thousand, seven hundred eighty-nine".