9983865 has 8 divisors (see below), whose sum is σ = 15974208. Its totient is φ = 5324720.

The previous prime is 9983839. The next prime is 9983867. The reversal of 9983865 is 5683899.

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

It is not a de Polignac number, because 9983865 - 2⁸ = 9983609 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9983867) 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 7 ways as a sum of consecutive naturals, for example, 332781 + ... + 332810.

It is an arithmetic number, because the mean of its divisors is an integer number (1996776).

Almost surely, 2^9983865 is an apocalyptic number.

It is an amenable number.

9983865 is a deficient number, since it is larger than the sum of its proper divisors (5990343).

9983865 is a wasteful number, since it uses less digits than its factorization.

9983865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665599.

The product of its digits is 466560, while the sum is 48.

The square root of 9983865 is about 3159.7254627578. The cubic root of 9983865 is about 215.3275339480.

The spelling of 9983865 in words is "nine million, nine hundred eighty-three thousand, eight hundred sixty-five".