8728513 has 2 divisors, whose sum is σ = 8728514. Its totient is φ = 8728512.

The previous prime is 8728483. The next prime is 8728549. The reversal of 8728513 is 3158278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5602689 + 3125824 = 2367^2 + 1768^2 .

It is a cyclic number.

It is not a de Polignac number, because 8728513 - 2⁵ = 8728481 is a prime.

8728513 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8720513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4364256 + 4364257.

It is an arithmetic number, because the mean of its divisors is an integer number (4364257).

Almost surely, 2^8728513 is an apocalyptic number.

It is an amenable number.

8728513 is a deficient number, since it is larger than the sum of its proper divisors (1).

8728513 is an equidigital number, since it uses as much as digits as its factorization.

8728513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 8728513 is about 2954.4056931979. The cubic root of 8728513 is about 205.8954523382.

The spelling of 8728513 in words is "eight million, seven hundred twenty-eight thousand, five hundred thirteen".