9929968587 has 24 divisors (see below), whose sum is σ = 17882542080. Its totient is φ = 5158424880.

The previous prime is 9929968579. The next prime is 9929968661. The reversal of 9929968587 is 7858699299.

It is a happy number.

It is not a de Polignac number, because 9929968587 - 2³ = 9929968579 is a prime.

It is a super-2 number, since 2×9929968587² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9929968547) 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, 7163787 + ... + 7165172.

It is an arithmetic number, because the mean of its divisors is an integer number (745105920).

Almost surely, 2^9929968587 is an apocalyptic number.

9929968587 is a deficient number, since it is larger than the sum of its proper divisors (7952573493).

9929968587 is a wasteful number, since it uses less digits than its factorization.

9929968587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14328983 (or 14328980 counting only the distinct ones).

The product of its digits is 176359680, while the sum is 72.

The square root of 9929968587 is about 99649.2277290697. The cubic root of 9929968587 is about 2149.3936337254.

The spelling of 9929968587 in words is "nine billion, nine hundred twenty-nine million, nine hundred sixty-eight thousand, five hundred eighty-seven".