9447684921 has 12 divisors (see below), whose sum is σ = 13676136448. Its totient is φ = 6284850264.

The previous prime is 9447684919. The next prime is 9447684949. The reversal of 9447684921 is 1294867449.

9447684921 is a `hidden beast` number, since 9 + 4 + 476 + 84 + 92 + 1 = 666.

It is not a de Polignac number, because 9447684921 - 2¹ = 9447684919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9447684221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1129465 + ... + 1137798.

Almost surely, 2^9447684921 is an apocalyptic number.

It is an amenable number.

9447684921 is a deficient number, since it is larger than the sum of its proper divisors (4228451527).

9447684921 is a wasteful number, since it uses less digits than its factorization.

9447684921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267732 (or 2267729 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 9447684921 is about 97199.2022652450. The cubic root of 9447684921 is about 2114.0169594525.

The spelling of 9447684921 in words is "nine billion, four hundred forty-seven million, six hundred eighty-four thousand, nine hundred twenty-one".