8720579 has 12 divisors (see below), whose sum is σ = 10473408. Its totient is φ = 7232400.

The previous prime is 8720557. The next prime is 8720581. The reversal of 8720579 is 9750278.

8720579 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 8720579 - 2²⁰ = 7672003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8720479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1352 + ... + 4389.

It is an arithmetic number, because the mean of its divisors is an integer number (872784).

Almost surely, 2^8720579 is an apocalyptic number.

8720579 is a deficient number, since it is larger than the sum of its proper divisors (1752829).

8720579 is a wasteful number, since it uses less digits than its factorization.

8720579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786 (or 5779 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 8720579 is about 2953.0626474899. The cubic root of 8720579 is about 205.8330488212.

The spelling of 8720579 in words is "eight million, seven hundred twenty thousand, five hundred seventy-nine".