9109985 has 4 divisors (see below), whose sum is σ = 10931988. Its totient is φ = 7287984.

The previous prime is 9109979. The next prime is 9109993. The reversal of 9109985 is 5899019.

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 6390784 + 2719201 = 2528^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 9109985 - 2⁸ = 9109729 is a prime.

It is a Duffinian 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, 910994 + ... + 911003.

It is an arithmetic number, because the mean of its divisors is an integer number (2732997).

Almost surely, 2^9109985 is an apocalyptic number.

It is an amenable number.

9109985 is a deficient number, since it is larger than the sum of its proper divisors (1822003).

9109985 is a wasteful number, since it uses less digits than its factorization.

9109985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822002.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 9109985 is about 3018.2751696954. The cubic root of 9109985 is about 208.8522799487.

The spelling of 9109985 in words is "nine million, one hundred nine thousand, nine hundred eighty-five".