86215859 has 2 divisors, whose sum is σ = 86215860. Its totient is φ = 86215858.

The previous prime is 86215853. The next prime is 86215873. The reversal of 86215859 is 95851268.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86215859 - 2⁸ = 86215603 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86215853) 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, 43107929 + 43107930.

It is an arithmetic number, because the mean of its divisors is an integer number (43107930).

Almost surely, 2^86215859 is an apocalyptic number.

86215859 is a deficient number, since it is larger than the sum of its proper divisors (1).

86215859 is an equidigital number, since it uses as much as digits as its factorization.

86215859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 44.

The square root of 86215859 is about 9285.2495389192. The cubic root of 86215859 is about 441.7694910630.

The spelling of 86215859 in words is "eighty-six million, two hundred fifteen thousand, eight hundred fifty-nine".