9090681 has 8 divisors (see below), whose sum is σ = 12648000. Its totient is φ = 5796912.

The previous prime is 9090671. The next prime is 9090689. The reversal of 9090681 is 1860909.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9090681 - 2⁵ = 9090649 is a prime.

It is a super-2 number, since 2×9090681² = 165280962087522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9090689) 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, 65806 + ... + 65943.

It is an arithmetic number, because the mean of its divisors is an integer number (1581000).

Almost surely, 2^9090681 is an apocalyptic number.

It is an amenable number.

9090681 is a deficient number, since it is larger than the sum of its proper divisors (3557319).

9090681 is a wasteful number, since it uses less digits than its factorization.

9090681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131775.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 9090681 is about 3015.0756209422. The cubic root of 9090681 is about 208.7046567465.

The spelling of 9090681 in words is "nine million, ninety thousand, six hundred eighty-one".