82685543 has 2 divisors, whose sum is σ = 82685544. Its totient is φ = 82685542.

The previous prime is 82685527. The next prime is 82685557. The reversal of 82685543 is 34558628.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82685543 - 2⁴ = 82685527 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82685543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82685503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41342771 + 41342772.

It is an arithmetic number, because the mean of its divisors is an integer number (41342772).

Almost surely, 2^82685543 is an apocalyptic number.

82685543 is a deficient number, since it is larger than the sum of its proper divisors (1).

82685543 is an equidigital number, since it uses as much as digits as its factorization.

82685543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 41.

The square root of 82685543 is about 9093.1591320069. The cubic root of 82685543 is about 435.6554930155.

The spelling of 82685543 in words is "eighty-two million, six hundred eighty-five thousand, five hundred forty-three".