9938981 has 8 divisors (see below), whose sum is σ = 10864224. Its totient is φ = 9036720.

The previous prime is 9938959. The next prime is 9938983. The reversal of 9938981 is 1898399.

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

It is a cyclic number.

It is not a de Polignac number, because 9938981 - 2¹⁰ = 9937957 is a prime.

It is a super-2 number, since 2×9938981² = 197566686636722, which 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 (9938983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4835 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (1358028).

Almost surely, 2^9938981 is an apocalyptic number.

It is an amenable number.

9938981 is a deficient number, since it is larger than the sum of its proper divisors (925243).

9938981 is a wasteful number, since it uses less digits than its factorization.

9938981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11491.

The product of its digits is 139968, while the sum is 47.

The square root of 9938981 is about 3152.6149463580. The cubic root of 9938981 is about 215.0043698409.

The spelling of 9938981 in words is "nine million, nine hundred thirty-eight thousand, nine hundred eighty-one".