9930681 has 12 divisors (see below), whose sum is σ = 14875952. Its totient is φ = 6620292.

The previous prime is 9930667. The next prime is 9930691. The reversal of 9930681 is 1860399.

It is not a de Polignac number, because 9930681 - 2⁹ = 9930169 is a prime.

It is a super-2 number, since 2×9930681² = 197236850247522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9930611) 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, 20191 + ... + 20676.

Almost surely, 2^9930681 is an apocalyptic number.

It is an amenable number.

9930681 is a deficient number, since it is larger than the sum of its proper divisors (4945271).

9930681 is an equidigital number, since it uses as much as digits as its factorization.

9930681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40882 (or 40870 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 9930681 is about 3151.2983038741. The cubic root of 9930681 is about 214.9445034336.

The spelling of 9930681 in words is "nine million, nine hundred thirty thousand, six hundred eighty-one".