9844486721 has 4 divisors (see below), whose sum is σ = 9870462000. Its totient is φ = 9818511444.

The previous prime is 9844486637. The next prime is 9844486763. The reversal of 9844486721 is 1276844489.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9844486721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9844486781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12987071 + ... + 12987828.

It is an arithmetic number, because the mean of its divisors is an integer number (2467615500).

Almost surely, 2^9844486721 is an apocalyptic number.

It is an amenable number.

9844486721 is a deficient number, since it is larger than the sum of its proper divisors (25975279).

9844486721 is a wasteful number, since it uses less digits than its factorization.

9844486721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25975278.

The product of its digits is 3096576, while the sum is 53.

The square root of 9844486721 is about 99219.3868203185. The cubic root of 9844486721 is about 2143.2081848815.

The spelling of 9844486721 in words is "nine billion, eight hundred forty-four million, four hundred eighty-six thousand, seven hundred twenty-one".