86544191 has 2 divisors, whose sum is σ = 86544192. Its totient is φ = 86544190.

The previous prime is 86544181. The next prime is 86544217. The reversal of 86544191 is 19144568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86544191 - 2¹⁰ = 86543167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86544181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43272095 + 43272096.

It is an arithmetic number, because the mean of its divisors is an integer number (43272096).

Almost surely, 2^86544191 is an apocalyptic number.

86544191 is a deficient number, since it is larger than the sum of its proper divisors (1).

86544191 is an equidigital number, since it uses as much as digits as its factorization.

86544191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 86544191 is about 9302.9130383982. The cubic root of 86544191 is about 442.3295710195.

The spelling of 86544191 in words is "eighty-six million, five hundred forty-four thousand, one hundred ninety-one".