9905090 has 24 divisors (see below), whose sum is σ = 19309428. Its totient is φ = 3656640.

The previous prime is 9905087. The next prime is 9905113. The reversal of 9905090 is 905099.

It can be written as a sum of positive squares in 6 ways, for example, as 863041 + 9042049 = 929^2 + 3007^2 .

It is a super-2 number, since 2×9905090² = 196221615816200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1241 + ... + 4620.

Almost surely, 2^9905090 is an apocalyptic number.

9905090 is a deficient number, since it is larger than the sum of its proper divisors (9404338).

9905090 is a wasteful number, since it uses less digits than its factorization.

9905090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5894 (or 5881 counting only the distinct ones).

The product of its (nonzero) digits is 3645, while the sum is 32.

The square root of 9905090 is about 3147.2352946674. The cubic root of 9905090 is about 214.7597099117.

The spelling of 9905090 in words is "nine million, nine hundred five thousand, ninety".