9441721919 has 16 divisors (see below), whose sum is σ = 11493715968. Its totient is φ = 7571225472.

The previous prime is 9441721879. The next prime is 9441721937. The reversal of 9441721919 is 9191271449.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9441721919 - 2¹⁶ = 9441656383 is a prime.

It is a super-2 number, since 2×9441721919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9441721969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217679 + ... + 257424.

It is an arithmetic number, because the mean of its divisors is an integer number (718357248).

Almost surely, 2^9441721919 is an apocalyptic number.

9441721919 is a deficient number, since it is larger than the sum of its proper divisors (2051994049).

9441721919 is a wasteful number, since it uses less digits than its factorization.

9441721919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475294.

The product of its digits is 163296, while the sum is 47.

The square root of 9441721919 is about 97168.5232932970. The cubic root of 9441721919 is about 2113.5721047781.

The spelling of 9441721919 in words is "nine billion, four hundred forty-one million, seven hundred twenty-one thousand, nine hundred nineteen".