8687513 has 2 divisors, whose sum is σ = 8687514. Its totient is φ = 8687512.

The previous prime is 8687479. The next prime is 8687521. The reversal of 8687513 is 3157868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8684809 + 2704 = 2947^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 8687513 - 2²⁰ = 7638937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8687213) 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, 4343756 + 4343757.

It is an arithmetic number, because the mean of its divisors is an integer number (4343757).

Almost surely, 2^8687513 is an apocalyptic number.

It is an amenable number.

8687513 is a deficient number, since it is larger than the sum of its proper divisors (1).

8687513 is an equidigital number, since it uses as much as digits as its factorization.

8687513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 8687513 is about 2947.4587359283. The cubic root of 8687513 is about 205.5725655052.

The spelling of 8687513 in words is "eight million, six hundred eighty-seven thousand, five hundred thirteen".