8685722887 has 2 divisors, whose sum is σ = 8685722888. Its totient is φ = 8685722886.

The previous prime is 8685722867. The next prime is 8685722891. The reversal of 8685722887 is 7882275868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8685722887 - 2¹¹ = 8685720839 is a prime.

It is a super-2 number, since 2×8685722887² (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 (8685722867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4342861443 + 4342861444.

It is an arithmetic number, because the mean of its divisors is an integer number (4342861444).

Almost surely, 2^8685722887 is an apocalyptic number.

8685722887 is a deficient number, since it is larger than the sum of its proper divisors (1).

8685722887 is an equidigital number, since it uses as much as digits as its factorization.

8685722887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24084480, while the sum is 61.

The square root of 8685722887 is about 93197.2257473365. The cubic root of 8685722887 is about 2055.5844472441.

The spelling of 8685722887 in words is "eight billion, six hundred eighty-five million, seven hundred twenty-two thousand, eight hundred eighty-seven".