8356681 has 2 divisors, whose sum is σ = 8356682. Its totient is φ = 8356680.

The previous prime is 8356679. The next prime is 8356697. The reversal of 8356681 is 1866538.

8356681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5683456 + 2673225 = 2384^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 8356681 - 2¹ = 8356679 is a prime.

It is a super-2 number, since 2×8356681² = 139668234671522, which contains 22 as substring.

Together with 8356679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8356681.

It is not a weakly prime, because it can be changed into another prime (8356631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4178340 + 4178341.

It is an arithmetic number, because the mean of its divisors is an integer number (4178341).

Almost surely, 2^8356681 is an apocalyptic number.

It is an amenable number.

8356681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8356681 is an equidigital number, since it uses as much as digits as its factorization.

8356681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 8356681 is about 2890.7924519066. The cubic root of 8356681 is about 202.9292302674.

The spelling of 8356681 in words is "eight million, three hundred fifty-six thousand, six hundred eighty-one".