9904981 has 4 divisors (see below), whose sum is σ = 9916192. Its totient is φ = 9893772.

The previous prime is 9904967. The next prime is 9904987. The reversal of 9904981 is 1894099.

9904981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9904981 - 2⁵ = 9904949 is a prime.

It is a super-2 number, since 2×9904981² = 196217297220722, 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 (9904987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4155 + ... + 6088.

It is an arithmetic number, because the mean of its divisors is an integer number (2479048).

Almost surely, 2^9904981 is an apocalyptic number.

It is an amenable number.

9904981 is a deficient number, since it is larger than the sum of its proper divisors (11211).

9904981 is a wasteful number, since it uses less digits than its factorization.

9904981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11210.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 9904981 is about 3147.2179778338. The cubic root of 9904981 is about 214.7589221385.

The spelling of 9904981 in words is "nine million, nine hundred four thousand, nine hundred eighty-one".