9711321987 has 16 divisors (see below), whose sum is σ = 13026041600. Its totient is φ = 6435472032.

The previous prime is 9711321929. The next prime is 9711322007. The reversal of 9711321987 is 7891231179.

It is not a de Polignac number, because 9711321987 - 2²⁰ = 9710273411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9711321887) 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, 659568 + ... + 674130.

It is an arithmetic number, because the mean of its divisors is an integer number (814127600).

Almost surely, 2^9711321987 is an apocalyptic number.

9711321987 is a deficient number, since it is larger than the sum of its proper divisors (3314719613).

9711321987 is a wasteful number, since it uses less digits than its factorization.

9711321987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15882.

The product of its digits is 190512, while the sum is 48.

The square root of 9711321987 is about 98546.0399356565. The cubic root of 9711321987 is about 2133.5006749401.

The spelling of 9711321987 in words is "nine billion, seven hundred eleven million, three hundred twenty-one thousand, nine hundred eighty-seven".