84171161 has 2 divisors, whose sum is σ = 84171162. Its totient is φ = 84171160.

The previous prime is 84171151. The next prime is 84171163. The reversal of 84171161 is 16117148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44089600 + 40081561 = 6640^2 + 6331^2 .

It is a cyclic number.

It is not a de Polignac number, because 84171161 - 2¹⁰ = 84170137 is a prime.

Together with 84171163, 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 (84171163) 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, 42085580 + 42085581.

It is an arithmetic number, because the mean of its divisors is an integer number (42085581).

Almost surely, 2^84171161 is an apocalyptic number.

It is an amenable number.

84171161 is a deficient number, since it is larger than the sum of its proper divisors (1).

84171161 is an equidigital number, since it uses as much as digits as its factorization.

84171161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 84171161 is about 9174.4842361846. The cubic root of 84171161 is about 438.2491736368.

The spelling of 84171161 in words is "eighty-four million, one hundred seventy-one thousand, one hundred sixty-one".