9989769531 has 8 divisors (see below), whose sum is σ = 15222505984. Its totient is φ = 5708439720.

The previous prime is 9989769529. The next prime is 9989769533. The reversal of 9989769531 is 1359679899.

It is an interprime number because it is at equal distance from previous prime (9989769529) and next prime (9989769533).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9989769531 - 2¹ = 9989769529 is a prime.

It is a super-2 number, since 2×9989769531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9989769533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237851635 + ... + 237851676.

It is an arithmetic number, because the mean of its divisors is an integer number (1902813248).

Almost surely, 2^9989769531 is an apocalyptic number.

9989769531 is a deficient number, since it is larger than the sum of its proper divisors (5232736453).

9989769531 is a wasteful number, since it uses less digits than its factorization.

9989769531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475703321.

The product of its digits is 33067440, while the sum is 66.

The square root of 9989769531 is about 99948.8345654916. The cubic root of 9989769531 is about 2153.6997434363.

The spelling of 9989769531 in words is "nine billion, nine hundred eighty-nine million, seven hundred sixty-nine thousand, five hundred thirty-one".