9840047 has 4 divisors (see below), whose sum is σ = 11245776. Its totient is φ = 8434320.

The previous prime is 9840031. The next prime is 9840049. The reversal of 9840047 is 7400489.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9840047 - 2⁴ = 9840031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9839995 and 9840022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9840049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702854 + ... + 702867.

It is an arithmetic number, because the mean of its divisors is an integer number (2811444).

Almost surely, 2^9840047 is an apocalyptic number.

9840047 is a deficient number, since it is larger than the sum of its proper divisors (1405729).

9840047 is a wasteful number, since it uses less digits than its factorization.

9840047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405728.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 9840047 is about 3136.8849197891. The cubic root of 9840047 is about 214.2885951147.

The spelling of 9840047 in words is "nine million, eight hundred forty thousand, forty-seven".