9904085 has 4 divisors (see below), whose sum is σ = 11884908. Its totient is φ = 7923264.

The previous prime is 9904079. The next prime is 9904117. The reversal of 9904085 is 5804099.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1844164 + 8059921 = 1358^2 + 2839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9904085 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990404 + ... + 990413.

It is an arithmetic number, because the mean of its divisors is an integer number (2971227).

Almost surely, 2^9904085 is an apocalyptic number.

It is an amenable number.

9904085 is a deficient number, since it is larger than the sum of its proper divisors (1980823).

9904085 is a wasteful number, since it uses less digits than its factorization.

9904085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980822.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 9904085 is about 3147.0756266731. The cubic root of 9904085 is about 214.7524462790.

The spelling of 9904085 in words is "nine million, nine hundred four thousand, eighty-five".