9409981 has 4 divisors (see below), whose sum is σ = 10754272. Its totient is φ = 8065692.

The previous prime is 9409973. The next prime is 9410003. The reversal of 9409981 is 1899049.

9409981 is digitally balanced in base 3, 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 9409981 - 2³ = 9409973 is a prime.

It is a super-2 number, since 2×9409981² = 177095484840722, 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 (9409181) 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, 672135 + ... + 672148.

It is an arithmetic number, because the mean of its divisors is an integer number (2688568).

Almost surely, 2^9409981 is an apocalyptic number.

It is an amenable number.

9409981 is a deficient number, since it is larger than the sum of its proper divisors (1344291).

9409981 is a wasteful number, since it uses less digits than its factorization.

9409981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344290.

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

The square root of 9409981 is about 3067.5692331225. The cubic root of 9409981 is about 211.1200996378.

The spelling of 9409981 in words is "nine million, four hundred nine thousand, nine hundred eighty-one".