8728549 has 2 divisors, whose sum is σ = 8728550. Its totient is φ = 8728548.

The previous prime is 8728513. The next prime is 8728571. The reversal of 8728549 is 9458278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6796449 + 1932100 = 2607^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 8728549 - 2⁹ = 8728037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8728579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4364274 + 4364275.

It is an arithmetic number, because the mean of its divisors is an integer number (4364275).

Almost surely, 2^8728549 is an apocalyptic number.

It is an amenable number.

8728549 is a deficient number, since it is larger than the sum of its proper divisors (1).

8728549 is an equidigital number, since it uses as much as digits as its factorization.

8728549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 8728549 is about 2954.4117857875. The cubic root of 8728549 is about 205.8957354038.

The spelling of 8728549 in words is "eight million, seven hundred twenty-eight thousand, five hundred forty-nine".