8879721 has 8 divisors (see below), whose sum is σ = 11857824. Its totient is φ = 5910720.

The previous prime is 8879719. The next prime is 8879723. The reversal of 8879721 is 1279788.

It is an interprime number because it is at equal distance from previous prime (8879719) and next prime (8879723).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8879721 - 2¹ = 8879719 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8879723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481 + ... + 4241.

It is an arithmetic number, because the mean of its divisors is an integer number (1482228).

Almost surely, 2^8879721 is an apocalyptic number.

It is an amenable number.

8879721 is a deficient number, since it is larger than the sum of its proper divisors (2978103).

8879721 is a wasteful number, since it uses less digits than its factorization.

8879721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4551.

The product of its digits is 56448, while the sum is 42.

The square root of 8879721 is about 2979.8860716477. The cubic root of 8879721 is about 207.0775923262.

The spelling of 8879721 in words is "eight million, eight hundred seventy-nine thousand, seven hundred twenty-one".