84511171 has 2 divisors, whose sum is σ = 84511172. Its totient is φ = 84511170.

The previous prime is 84511159. The next prime is 84511201. The reversal of 84511171 is 17111548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84511171 - 2⁹ = 84510659 is a prime.

It is not a weakly prime, because it can be changed into another prime (84511111) 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, 42255585 + 42255586.

It is an arithmetic number, because the mean of its divisors is an integer number (42255586).

Almost surely, 2^84511171 is an apocalyptic number.

84511171 is a deficient number, since it is larger than the sum of its proper divisors (1).

84511171 is an equidigital number, since it uses as much as digits as its factorization.

84511171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 28.

The square root of 84511171 is about 9192.9957576407. The cubic root of 84511171 is about 438.8384843846.

The spelling of 84511171 in words is "eighty-four million, five hundred eleven thousand, one hundred seventy-one".