9987717319 has 2 divisors, whose sum is σ = 9987717320. Its totient is φ = 9987717318.

The previous prime is 9987717239. The next prime is 9987717343. The reversal of 9987717319 is 9137177899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9987717319 - 2²¹ = 9985620167 is a prime.

It is a super-2 number, since 2×9987717319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987717419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993858659 + 4993858660.

It is an arithmetic number, because the mean of its divisors is an integer number (4993858660).

Almost surely, 2^9987717319 is an apocalyptic number.

9987717319 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987717319 is an equidigital number, since it uses as much as digits as its factorization.

9987717319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6001128, while the sum is 61.

The square root of 9987717319 is about 99938.5677253782. The cubic root of 9987717319 is about 2153.5522541762.

The spelling of 9987717319 in words is "nine billion, nine hundred eighty-seven million, seven hundred seventeen thousand, three hundred nineteen".