9987717311 has 24 divisors (see below), whose sum is σ = 12492350064. Its totient is φ = 7888258560.

The previous prime is 9987717239. The next prime is 9987717319. The reversal of 9987717311 is 1137177899.

It is not a de Polignac number, because 9987717311 - 2¹⁴ = 9987700927 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 (9987717319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126416 + ... + 189621.

It is an arithmetic number, because the mean of its divisors is an integer number (520514586).

Almost surely, 2^9987717311 is an apocalyptic number.

9987717311 is a deficient number, since it is larger than the sum of its proper divisors (2504632753).

9987717311 is a wasteful number, since it uses less digits than its factorization.

9987717311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316091 (or 316078 counting only the distinct ones).

The product of its digits is 666792, while the sum is 53.

The square root of 9987717311 is about 99938.5676853536. The cubic root of 9987717311 is about 2153.5522536012.

The spelling of 9987717311 in words is "nine billion, nine hundred eighty-seven million, seven hundred seventeen thousand, three hundred eleven".