9717796891 has 12 divisors (see below), whose sum is σ = 10721289600. Its totient is φ = 8801489840.

The previous prime is 9717796871. The next prime is 9717796897. The reversal of 9717796891 is 1986977179.

It is not a de Polignac number, because 9717796891 - 2¹⁷ = 9717665819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9717796897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116731 + ... + 181828.

It is an arithmetic number, because the mean of its divisors is an integer number (893440800).

Almost surely, 2^9717796891 is an apocalyptic number.

9717796891 is a deficient number, since it is larger than the sum of its proper divisors (1003492709).

9717796891 is a wasteful number, since it uses less digits than its factorization.

9717796891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298850 (or 298839 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 64.

The square root of 9717796891 is about 98578.8866390770. The cubic root of 9717796891 is about 2133.9747313407.

It can be divided in two parts, 9717 and 796891, that added together give a palindrome (806608).

The spelling of 9717796891 in words is "nine billion, seven hundred seventeen million, seven hundred ninety-six thousand, eight hundred ninety-one".