9711321985 has 4 divisors (see below), whose sum is σ = 11653586388. Its totient is φ = 7769057584.

The previous prime is 9711321929. The next prime is 9711322007. The reversal of 9711321985 is 5891231179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5891231179 = 439 ⋅13419661.

It can be written as a sum of positive squares in 2 ways, for example, as 5543844849 + 4167477136 = 74457^2 + 64556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9711321985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971132194 + ... + 971132203.

It is an arithmetic number, because the mean of its divisors is an integer number (2913396597).

Almost surely, 2^9711321985 is an apocalyptic number.

It is an amenable number.

9711321985 is a deficient number, since it is larger than the sum of its proper divisors (1942264403).

9711321985 is a wasteful number, since it uses less digits than its factorization.

9711321985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942264402.

The product of its digits is 136080, while the sum is 46.

The square root of 9711321985 is about 98546.0399255089. The cubic root of 9711321985 is about 2133.5006747936.

The spelling of 9711321985 in words is "nine billion, seven hundred eleven million, three hundred twenty-one thousand, nine hundred eighty-five".