9729985 has 8 divisors (see below), whose sum is σ = 11874240. Its totient is φ = 7651824.

The previous prime is 9729983. The next prime is 9729991. The reversal of 9729985 is 5899279.

9729985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9729985 - 2¹ = 9729983 is a prime.

9729985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9729983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16197 + ... + 16786.

It is an arithmetic number, because the mean of its divisors is an integer number (1484280).

Almost surely, 2^9729985 is an apocalyptic number.

It is an amenable number.

9729985 is a deficient number, since it is larger than the sum of its proper divisors (2144255).

9729985 is a wasteful number, since it uses less digits than its factorization.

9729985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33047.

The product of its digits is 408240, while the sum is 49.

The square root of 9729985 is about 3119.2923877059. The cubic root of 9729985 is about 213.4866505848.

The spelling of 9729985 in words is "nine million, seven hundred twenty-nine thousand, nine hundred eighty-five".