9989725311 has 12 divisors (see below), whose sum is σ = 14534930592. Its totient is φ = 6611204256.

The previous prime is 9989725307. The next prime is 9989725313. The reversal of 9989725311 is 1135279899.

It is not a de Polignac number, because 9989725311 - 2² = 9989725307 is a prime.

It is a super-2 number, since 2×9989725311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989725313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4049751 + ... + 4052216.

It is an arithmetic number, because the mean of its divisors is an integer number (1211244216).

Almost surely, 2^9989725311 is an apocalyptic number.

9989725311 is a deficient number, since it is larger than the sum of its proper divisors (4545205281).

9989725311 is a wasteful number, since it uses less digits than its factorization.

9989725311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102110 (or 8102107 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 9989725311 is about 99948.6133520621. The cubic root of 9989725311 is about 2153.6965656271.

The spelling of 9989725311 in words is "nine billion, nine hundred eighty-nine million, seven hundred twenty-five thousand, three hundred eleven".