86171647 has 2 divisors, whose sum is σ = 86171648. Its totient is φ = 86171646.

The previous prime is 86171641. The next prime is 86171677. The reversal of 86171647 is 74617168.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86171647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86171641) 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, 43085823 + 43085824.

It is an arithmetic number, because the mean of its divisors is an integer number (43085824).

Almost surely, 2^86171647 is an apocalyptic number.

86171647 is a deficient number, since it is larger than the sum of its proper divisors (1).

86171647 is an equidigital number, since it uses as much as digits as its factorization.

86171647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 86171647 is about 9282.8684683130. The cubic root of 86171647 is about 441.6939641528.

The spelling of 86171647 in words is "eighty-six million, one hundred seventy-one thousand, six hundred forty-seven".