8513768869 has 2 divisors, whose sum is σ = 8513768870. Its totient is φ = 8513768868.

The previous prime is 8513768819. The next prime is 8513768891. The reversal of 8513768869 is 9688673158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4447155969 + 4066612900 = 66687^2 + 63770^2 .

It is a cyclic number.

It is not a de Polignac number, because 8513768869 - 2⁹ = 8513768357 is a prime.

It is a super-2 number, since 2×8513768869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8513768819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256884434 + 4256884435.

It is an arithmetic number, because the mean of its divisors is an integer number (4256884435).

Almost surely, 2^8513768869 is an apocalyptic number.

It is an amenable number.

8513768869 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513768869 is an equidigital number, since it uses as much as digits as its factorization.

8513768869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 61.

The square root of 8513768869 is about 92270.0865340442. The cubic root of 8513768869 is about 2041.9289128468.

The spelling of 8513768869 in words is "eight billion, five hundred thirteen million, seven hundred sixty-eight thousand, eight hundred sixty-nine".