8681693 has 2 divisors, whose sum is σ = 8681694. Its totient is φ = 8681692.

The previous prime is 8681669. The next prime is 8681707. The reversal of 8681693 is 3961868.

It is a happy number.

8681693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8305924 + 375769 = 2882^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 8681693 - 2¹⁰ = 8680669 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8681693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8681623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4340846 + 4340847.

It is an arithmetic number, because the mean of its divisors is an integer number (4340847).

Almost surely, 2^8681693 is an apocalyptic number.

It is an amenable number.

8681693 is a deficient number, since it is larger than the sum of its proper divisors (1).

8681693 is an equidigital number, since it uses as much as digits as its factorization.

8681693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 8681693 is about 2946.4712793442. The cubic root of 8681693 is about 205.5266490423.

The spelling of 8681693 in words is "eight million, six hundred eighty-one thousand, six hundred ninety-three".