9903681 has 16 divisors (see below), whose sum is σ = 14923200. Its totient is φ = 6489504.

The previous prime is 9903671. The next prime is 9903683. The reversal of 9903681 is 1863099.

It is not a de Polignac number, because 9903681 - 2⁹ = 9903169 is a prime.

It is a super-3 number, since 3×9903681³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (9903683) 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 15 ways as a sum of consecutive naturals, for example, 1516 + ... + 4701.

It is an arithmetic number, because the mean of its divisors is an integer number (932700).

Almost surely, 2^9903681 is an apocalyptic number.

It is an amenable number.

9903681 is a deficient number, since it is larger than the sum of its proper divisors (5019519).

9903681 is a wasteful number, since it uses less digits than its factorization.

9903681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285 (or 6279 counting only the distinct ones).

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

The square root of 9903681 is about 3147.0114394454. The cubic root of 9903681 is about 214.7495262324.

The spelling of 9903681 in words is "nine million, nine hundred three thousand, six hundred eighty-one".