9009381 has 16 divisors (see below), whose sum is σ = 12458880. Its totient is φ = 5786880.

The previous prime is 9009379. The next prime is 9009391. The reversal of 9009381 is 1839009.

It is a happy number.

9009381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9009381 - 2¹ = 9009379 is a prime.

It is a super-2 number, since 2×9009381² = 162337892006322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9009331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10536 + ... + 11358.

It is an arithmetic number, because the mean of its divisors is an integer number (778680).

Almost surely, 2^9009381 is an apocalyptic number.

It is an amenable number.

9009381 is a deficient number, since it is larger than the sum of its proper divisors (3449499).

9009381 is a wasteful number, since it uses less digits than its factorization.

9009381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 9009381 is about 3001.5630927902. The cubic root of 9009381 is about 208.0806285663.

The spelling of 9009381 in words is "nine million, nine thousand, three hundred eighty-one".