9657022721 has 8 divisors (see below), whose sum is σ = 9681534720. Its totient is φ = 9632529808.

The previous prime is 9657022657. The next prime is 9657022819. The reversal of 9657022721 is 1272207569.

9657022721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9657022721 - 2⁶ = 9657022657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9657022021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1873670 + ... + 1878816.

It is an arithmetic number, because the mean of its divisors is an integer number (1210191840).

Almost surely, 2^9657022721 is an apocalyptic number.

It is an amenable number.

9657022721 is a deficient number, since it is larger than the sum of its proper divisors (24511999).

9657022721 is a wasteful number, since it uses less digits than its factorization.

9657022721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 9657022721 is about 98270.1517298106. The cubic root of 9657022721 is about 2129.5168675805.

The spelling of 9657022721 in words is "nine billion, six hundred fifty-seven million, twenty-two thousand, seven hundred twenty-one".