8681513 has 2 divisors, whose sum is σ = 8681514. Its totient is φ = 8681512.

The previous prime is 8681507. The next prime is 8681539. The reversal of 8681513 is 3151868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7997584 + 683929 = 2828^2 + 827^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8681513 is a prime.

It is a super-4 number, since 4×8681513⁴ (a number of 29 digits) contains 4444 as substring.

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 8681513.

It is not a weakly prime, because it can be changed into another prime (8681503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4340756 + 4340757.

It is an arithmetic number, because the mean of its divisors is an integer number (4340757).

Almost surely, 2^8681513 is an apocalyptic number.

It is an amenable number.

8681513 is a deficient number, since it is larger than the sum of its proper divisors (1).

8681513 is an equidigital number, since it uses as much as digits as its factorization.

8681513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 8681513 is about 2946.4407341740. The cubic root of 8681513 is about 205.5252286184.

The spelling of 8681513 in words is "eight million, six hundred eighty-one thousand, five hundred thirteen".