9989468831 has 4 divisors (see below), whose sum is σ = 9992202600. Its totient is φ = 9986735064.

The previous prime is 9989468807. The next prime is 9989468869. The reversal of 9989468831 is 1388649899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9989468831 is a prime.

It is a super-2 number, since 2×9989468831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989468131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361396 + ... + 1368713.

It is an arithmetic number, because the mean of its divisors is an integer number (2498050650).

Almost surely, 2^9989468831 is an apocalyptic number.

9989468831 is a deficient number, since it is larger than the sum of its proper divisors (2733769).

9989468831 is a wasteful number, since it uses less digits than its factorization.

9989468831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733768.

The product of its digits is 26873856, while the sum is 65.

The square root of 9989468831 is about 99947.3302845053. The cubic root of 9989468831 is about 2153.6781338617.

The spelling of 9989468831 in words is "nine billion, nine hundred eighty-nine million, four hundred sixty-eight thousand, eight hundred thirty-one".