8681090513 has 2 divisors, whose sum is σ = 8681090514. Its totient is φ = 8681090512.

The previous prime is 8681090501. The next prime is 8681090543. The reversal of 8681090513 is 3150901868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5254510144 + 3426580369 = 72488^2 + 58537^2 .

It is a cyclic number.

It is not a de Polignac number, because 8681090513 - 2⁴ = 8681090497 is a prime.

It is a super-2 number, since 2×8681090513² (a number of 21 digits) contains 22 as substring.

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 (8681090543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4340545256 + 4340545257.

It is an arithmetic number, because the mean of its divisors is an integer number (4340545257).

Almost surely, 2^8681090513 is an apocalyptic number.

It is an amenable number.

8681090513 is a deficient number, since it is larger than the sum of its proper divisors (1).

8681090513 is an equidigital number, since it uses as much as digits as its factorization.

8681090513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 8681090513 is about 93172.3699011676. The cubic root of 8681090513 is about 2055.2189459338.

The spelling of 8681090513 in words is "eight billion, six hundred eighty-one million, ninety thousand, five hundred thirteen".