84385771 has 2 divisors, whose sum is σ = 84385772. Its totient is φ = 84385770.

The previous prime is 84385759. The next prime is 84385787. The reversal of 84385771 is 17758348.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84385771 - 2¹¹ = 84383723 is a prime.

It is not a weakly prime, because it can be changed into another prime (84380771) 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, 42192885 + 42192886.

It is an arithmetic number, because the mean of its divisors is an integer number (42192886).

Almost surely, 2^84385771 is an apocalyptic number.

84385771 is a deficient number, since it is larger than the sum of its proper divisors (1).

84385771 is an equidigital number, since it uses as much as digits as its factorization.

84385771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 43.

The square root of 84385771 is about 9186.1728157051. The cubic root of 84385771 is about 438.6213234016.

The spelling of 84385771 in words is "eighty-four million, three hundred eighty-five thousand, seven hundred seventy-one".