85866787 has 2 divisors, whose sum is σ = 85866788. Its totient is φ = 85866786.

The previous prime is 85866749. The next prime is 85866811. The reversal of 85866787 is 78766858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85866787 - 2¹⁵ = 85834019 is a prime.

It is not a weakly prime, because it can be changed into another prime (85866707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42933393 + 42933394.

It is an arithmetic number, because the mean of its divisors is an integer number (42933394).

Almost surely, 2^85866787 is an apocalyptic number.

85866787 is a deficient number, since it is larger than the sum of its proper divisors (1).

85866787 is an equidigital number, since it uses as much as digits as its factorization.

85866787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 55.

The square root of 85866787 is about 9266.4333483817. The cubic root of 85866787 is about 441.1724703885.

The spelling of 85866787 in words is "eighty-five million, eight hundred sixty-six thousand, seven hundred eighty-seven".