8728717 has 2 divisors, whose sum is σ = 8728718. Its totient is φ = 8728716.

The previous prime is 8728711. The next prime is 8728721. The reversal of 8728717 is 7178278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8726116 + 2601 = 2954^2 + 51^2 .

It is a cyclic number.

It is not a de Polignac number, because 8728717 - 2¹⁵ = 8695949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8728717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8728711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4364358 + 4364359.

It is an arithmetic number, because the mean of its divisors is an integer number (4364359).

Almost surely, 2^8728717 is an apocalyptic number.

It is an amenable number.

8728717 is a deficient number, since it is larger than the sum of its proper divisors (1).

8728717 is an equidigital number, since it uses as much as digits as its factorization.

8728717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904, while the sum is 40.

The square root of 8728717 is about 2954.4402177062. The cubic root of 8728717 is about 205.8970563665.

The spelling of 8728717 in words is "eight million, seven hundred twenty-eight thousand, seven hundred seventeen".