9771342789 has 16 divisors (see below), whose sum is σ = 14141130752. Its totient is φ = 5965783488.

The previous prime is 9771342731. The next prime is 9771342797. The reversal of 9771342789 is 9872431779.

It is not a de Polignac number, because 9771342789 - 2⁸ = 9771342533 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 (9771342089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 981454 + ... + 991359.

It is an arithmetic number, because the mean of its divisors is an integer number (883820672).

Almost surely, 2^9771342789 is an apocalyptic number.

It is an amenable number.

9771342789 is a deficient number, since it is larger than the sum of its proper divisors (4369787963).

9771342789 is a wasteful number, since it uses less digits than its factorization.

9771342789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972956.

The product of its digits is 5334336, while the sum is 57.

The square root of 9771342789 is about 98850.1026251364. The cubic root of 9771342789 is about 2137.8870159730.

The spelling of 9771342789 in words is "nine billion, seven hundred seventy-one million, three hundred forty-two thousand, seven hundred eighty-nine".