82086689 has 2 divisors, whose sum is σ = 82086690. Its totient is φ = 82086688.

The previous prime is 82086677. The next prime is 82086691. The reversal of 82086689 is 98668028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80694289 + 1392400 = 8983^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 82086689 - 2⁴ = 82086673 is a prime.

Together with 82086691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82086619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41043344 + 41043345.

It is an arithmetic number, because the mean of its divisors is an integer number (41043345).

Almost surely, 2^82086689 is an apocalyptic number.

It is an amenable number.

82086689 is a deficient number, since it is larger than the sum of its proper divisors (1).

82086689 is an equidigital number, since it uses as much as digits as its factorization.

82086689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 82086689 is about 9060.1704730099. The cubic root of 82086689 is about 434.6011917131.

The spelling of 82086689 in words is "eighty-two million, eighty-six thousand, six hundred eighty-nine".