8721679 has 8 divisors (see below), whose sum is σ = 8919360. Its totient is φ = 8526336.

The previous prime is 8721673. The next prime is 8721701. The reversal of 8721679 is 9761278.

8721679 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8721679 - 2¹³ = 8713487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721673) 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, 8439 + ... + 9415.

It is an arithmetic number, because the mean of its divisors is an integer number (1114920).

Almost surely, 2^8721679 is an apocalyptic number.

8721679 is a deficient number, since it is larger than the sum of its proper divisors (197681).

8721679 is a wasteful number, since it uses less digits than its factorization.

8721679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169.

The product of its digits is 42336, while the sum is 40.

The square root of 8721679 is about 2953.2488889357. The cubic root of 8721679 is about 205.8417029421.

The spelling of 8721679 in words is "eight million, seven hundred twenty-one thousand, six hundred seventy-nine".