8721163 has 8 divisors (see below), whose sum is σ = 9927936. Its totient is φ = 7583400.

The previous prime is 8721157. The next prime is 8721191. The reversal of 8721163 is 3611278.

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

It is a de Polignac number, because none of the positive numbers 2^k-8721163 is a prime.

It is a Duffinian number.

8721163 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721763) 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, 16983 + ... + 17488.

It is an arithmetic number, because the mean of its divisors is an integer number (1240992).

Almost surely, 2^8721163 is an apocalyptic number.

8721163 is a deficient number, since it is larger than the sum of its proper divisors (1206773).

8721163 is a wasteful number, since it uses less digits than its factorization.

8721163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34505.

The product of its digits is 2016, while the sum is 28.

The square root of 8721163 is about 2953.1615262291. The cubic root of 8721163 is about 205.8376434632.

The spelling of 8721163 in words is "eight million, seven hundred twenty-one thousand, one hundred sixty-three".