81065683 has 2 divisors, whose sum is σ = 81065684. Its totient is φ = 81065682.

The previous prime is 81065681. The next prime is 81065711. The reversal of 81065683 is 38656018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81065683 - 2¹ = 81065681 is a prime.

Together with 81065681, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (81065681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40532841 + 40532842.

It is an arithmetic number, because the mean of its divisors is an integer number (40532842).

Almost surely, 2^81065683 is an apocalyptic number.

81065683 is a deficient number, since it is larger than the sum of its proper divisors (1).

81065683 is an equidigital number, since it uses as much as digits as its factorization.

81065683 is an evil number, because the sum of its binary digits is even.

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

The square root of 81065683 is about 9003.6483160994. The cubic root of 81065683 is about 432.7917916899.

The spelling of 81065683 in words is "eighty-one million, sixty-five thousand, six hundred eighty-three".