82785271 has 2 divisors, whose sum is σ = 82785272. Its totient is φ = 82785270.

The previous prime is 82785259. The next prime is 82785289. The reversal of 82785271 is 17258728.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82785271 - 2⁹ = 82784759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82785251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41392635 + 41392636.

It is an arithmetic number, because the mean of its divisors is an integer number (41392636).

Almost surely, 2^82785271 is an apocalyptic number.

82785271 is a deficient number, since it is larger than the sum of its proper divisors (1).

82785271 is an equidigital number, since it uses as much as digits as its factorization.

82785271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 40.

The square root of 82785271 is about 9098.6411622835. The cubic root of 82785271 is about 435.8305723736.

The spelling of 82785271 in words is "eighty-two million, seven hundred eighty-five thousand, two hundred seventy-one".