9721143361 has 8 divisors (see below), whose sum is σ = 10144934784. Its totient is φ = 9297446400.

The previous prime is 9721143353. The next prime is 9721143391. The reversal of 9721143361 is 1633411279.

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

It is not a de Polignac number, because 9721143361 - 2³ = 9721143353 is a prime.

It is a super-2 number, since 2×9721143361² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9721143361.

It is not an unprimeable number, because it can be changed into a prime (9721143391) 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, 258561 + ... + 293761.

It is an arithmetic number, because the mean of its divisors is an integer number (1268116848).

Almost surely, 2^9721143361 is an apocalyptic number.

It is an amenable number.

9721143361 is a deficient number, since it is larger than the sum of its proper divisors (423791423).

9721143361 is a wasteful number, since it uses less digits than its factorization.

9721143361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47231.

The product of its digits is 27216, while the sum is 37.

The square root of 9721143361 is about 98595.8587416328. The cubic root of 9721143361 is about 2134.2196586948.

The spelling of 9721143361 in words is "nine billion, seven hundred twenty-one million, one hundred forty-three thousand, three hundred sixty-one".