9721352861 has 8 divisors (see below), whose sum is σ = 10651833504. Its totient is φ = 8798659120.

The previous prime is 9721352857. The next prime is 9721352867. The reversal of 9721352861 is 1682531279.

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

It is a cyclic number.

It is not a de Polignac number, because 9721352861 - 2² = 9721352857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721352867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1944110 + ... + 1949103.

It is an arithmetic number, because the mean of its divisors is an integer number (1331479188).

Almost surely, 2^9721352861 is an apocalyptic number.

It is an amenable number.

9721352861 is a deficient number, since it is larger than the sum of its proper divisors (930480643).

9721352861 is a wasteful number, since it uses less digits than its factorization.

9721352861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893451.

The product of its digits is 181440, while the sum is 44.

The square root of 9721352861 is about 98596.9211537561. The cubic root of 9721352861 is about 2134.2349900809.

The spelling of 9721352861 in words is "nine billion, seven hundred twenty-one million, three hundred fifty-two thousand, eight hundred sixty-one".