9889731 has 12 divisors (see below), whose sum is σ = 14340352. Its totient is φ = 6567696.

The previous prime is 9889723. The next prime is 9889741. The reversal of 9889731 is 1379889.

It is not a de Polignac number, because 9889731 - 2³ = 9889723 is a prime.

It is a super-2 number, since 2×9889731² = 195613558504722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9889741) 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, 510 + ... + 4476.

Almost surely, 2^9889731 is an apocalyptic number.

9889731 is a deficient number, since it is larger than the sum of its proper divisors (4450621).

9889731 is a wasteful number, since it uses less digits than its factorization.

9889731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250 (or 4247 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 9889731 is about 3144.7942699007. The cubic root of 9889731 is about 214.6486491421.

The spelling of 9889731 in words is "nine million, eight hundred eighty-nine thousand, seven hundred thirty-one".