8847921 has 16 divisors (see below), whose sum is σ = 12281600. Its totient is φ = 5660928.

The previous prime is 8847919. The next prime is 8847941. The reversal of 8847921 is 1297488.

It is not a de Polignac number, because 8847921 - 2¹ = 8847919 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8847921.

It is not an unprimeable number, because it can be changed into a prime (8847911) 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, 8265 + ... + 9273.

It is an arithmetic number, because the mean of its divisors is an integer number (767600).

Almost surely, 2^8847921 is an apocalyptic number.

It is an amenable number.

8847921 is a deficient number, since it is larger than the sum of its proper divisors (3433679).

8847921 is a wasteful number, since it uses less digits than its factorization.

8847921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its digits is 32256, while the sum is 39.

The square root of 8847921 is about 2974.5455115026. The cubic root of 8847921 is about 206.8301016707.

The spelling of 8847921 in words is "eight million, eight hundred forty-seven thousand, nine hundred twenty-one".