86840717 has 2 divisors, whose sum is σ = 86840718. Its totient is φ = 86840716.

The previous prime is 86840711. The next prime is 86840737. The reversal of 86840717 is 71704868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71048041 + 15792676 = 8429^2 + 3974^2 .

It is a cyclic number.

It is not a de Polignac number, because 86840717 - 2⁴ = 86840701 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 (86840711) 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, 43420358 + 43420359.

It is an arithmetic number, because the mean of its divisors is an integer number (43420359).

Almost surely, 2^86840717 is an apocalyptic number.

It is an amenable number.

86840717 is a deficient number, since it is larger than the sum of its proper divisors (1).

86840717 is an equidigital number, since it uses as much as digits as its factorization.

86840717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 86840717 is about 9318.8366763239. The cubic root of 86840717 is about 442.8341791323.

The spelling of 86840717 in words is "eighty-six million, eight hundred forty thousand, seven hundred seventeen".