8713685689 has 2 divisors, whose sum is σ = 8713685690. Its totient is φ = 8713685688.

The previous prime is 8713685663. The next prime is 8713685707. The reversal of 8713685689 is 9865863178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8619265600 + 94420089 = 92840^2 + 9717^2 .

It is a cyclic number.

It is not a de Polignac number, because 8713685689 - 2²⁹ = 8176814777 is a prime.

It is a super-3 number, since 3×8713685689³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (8713685609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4356842844 + 4356842845.

It is an arithmetic number, because the mean of its divisors is an integer number (4356842845).

Almost surely, 2^8713685689 is an apocalyptic number.

It is an amenable number.

8713685689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8713685689 is an equidigital number, since it uses as much as digits as its factorization.

8713685689 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 8713685689 is about 93347.1246959434. The cubic root of 8713685689 is about 2057.7879992938.

The spelling of 8713685689 in words is "eight billion, seven hundred thirteen million, six hundred eighty-five thousand, six hundred eighty-nine".