8909985 has 16 divisors (see below), whose sum is σ = 16292736. Its totient is φ = 4073088.

The previous prime is 8909983. The next prime is 8910001. The reversal of 8909985 is 5899098.

8909985 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8909985 - 2¹ = 8909983 is a prime.

8909985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8909983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42324 + ... + 42533.

It is an arithmetic number, because the mean of its divisors is an integer number (1018296).

Almost surely, 2^8909985 is an apocalyptic number.

It is an amenable number.

8909985 is a deficient number, since it is larger than the sum of its proper divisors (7382751).

8909985 is a wasteful number, since it uses less digits than its factorization.

8909985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84872.

The product of its (nonzero) digits is 233280, while the sum is 48.

The square root of 8909985 is about 2984.9597987243. The cubic root of 8909985 is about 207.3125805632.

The spelling of 8909985 in words is "eight million, nine hundred nine thousand, nine hundred eighty-five".