9447670221 has 32 divisors (see below), whose sum is σ = 14163932160. Its totient is φ = 5551804800.

The previous prime is 9447670171. The next prime is 9447670229. The reversal of 9447670221 is 1220767449.

It is not a de Polignac number, because 9447670221 - 2¹⁰ = 9447669197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9447670229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199120 + ... + 241958.

It is an arithmetic number, because the mean of its divisors is an integer number (442622880).

Almost surely, 2^9447670221 is an apocalyptic number.

It is an amenable number.

9447670221 is a deficient number, since it is larger than the sum of its proper divisors (4716261939).

9447670221 is a wasteful number, since it uses less digits than its factorization.

9447670221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43057.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 9447670221 is about 97199.1266473110. The cubic root of 9447670221 is about 2114.0158630264.

The spelling of 9447670221 in words is "nine billion, four hundred forty-seven million, six hundred seventy thousand, two hundred twenty-one".