9704643221 has 16 divisors (see below), whose sum is σ = 11947219200. Its totient is φ = 7676443008.

The previous prime is 9704643191. The next prime is 9704643227. The reversal of 9704643221 is 1223464079.

It is not a de Polignac number, because 9704643221 - 2¹⁰ = 9704642197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9704643227) 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, 421865 + ... + 444273.

It is an arithmetic number, because the mean of its divisors is an integer number (746701200).

Almost surely, 2^9704643221 is an apocalyptic number.

9704643221 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9704643221 is a deficient number, since it is larger than the sum of its proper divisors (2242575979).

9704643221 is a wasteful number, since it uses less digits than its factorization.

9704643221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27188.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 9704643221 is about 98512.1475808948. The cubic root of 9704643221 is about 2133.0114720777.

The spelling of 9704643221 in words is "nine billion, seven hundred four million, six hundred forty-three thousand, two hundred twenty-one".