9843344721 has 16 divisors (see below), whose sum is σ = 16665980800. Its totient is φ = 5624768304.

The previous prime is 9843344717. The next prime is 9843344761. The reversal of 9843344721 is 1274433489.

It is not a de Polignac number, because 9843344721 - 2² = 9843344717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9843344701) 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, 26040406 + ... + 26040783.

It is an arithmetic number, because the mean of its divisors is an integer number (1041623800).

Almost surely, 2^9843344721 is an apocalyptic number.

It is an amenable number.

9843344721 is a deficient number, since it is larger than the sum of its proper divisors (6822636079).

9843344721 is a wasteful number, since it uses less digits than its factorization.

9843344721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52081205 (or 52081199 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 9843344721 is about 99213.6317297175. The cubic root of 9843344721 is about 2143.1253080908.

The spelling of 9843344721 in words is "nine billion, eight hundred forty-three million, three hundred forty-four thousand, seven hundred twenty-one".