8859721 has 8 divisors (see below), whose sum is σ = 9611840. Its totient is φ = 8117712.

The previous prime is 8859709. The next prime is 8859733. The reversal of 8859721 is 1279588.

It is an interprime number because it is at equal distance from previous prime (8859709) and next prime (8859733).

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

It is a cyclic number.

It is not a de Polignac number, because 8859721 - 2¹³ = 8851529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8859421) 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, 645 + ... + 4258.

It is an arithmetic number, because the mean of its divisors is an integer number (1201480).

Almost surely, 2^8859721 is an apocalyptic number.

It is an amenable number.

8859721 is a deficient number, since it is larger than the sum of its proper divisors (752119).

8859721 is a wasteful number, since it uses less digits than its factorization.

8859721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055.

The product of its digits is 40320, while the sum is 40.

The square root of 8859721 is about 2976.5283469169. The cubic root of 8859721 is about 206.9220069156.

The spelling of 8859721 in words is "eight million, eight hundred fifty-nine thousand, seven hundred twenty-one".