9009881 has 8 divisors (see below), whose sum is σ = 9606600. Its totient is φ = 8420608.

The previous prime is 9009851. The next prime is 9009893. The reversal of 9009881 is 1889009.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 105625 + 8904256 = 325^2 + 2984^2 .

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 9009881 - 2¹⁸ = 8747737 is a prime.

It is a super-2 number, since 2×9009881² = 162355911268322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9009811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755 + ... + 4311.

It is an arithmetic number, because the mean of its divisors is an integer number (1200825).

Almost surely, 2^9009881 is an apocalyptic number.

It is an amenable number.

9009881 is a deficient number, since it is larger than the sum of its proper divisors (596719).

9009881 is a wasteful number, since it uses less digits than its factorization.

9009881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 9009881 is about 3001.6463815713. The cubic root of 9009881 is about 208.0844778277.

The spelling of 9009881 in words is "nine million, nine thousand, eight hundred eighty-one".