86571109 has 2 divisors, whose sum is σ = 86571110. Its totient is φ = 86571108.

The previous prime is 86571097. The next prime is 86571137. The reversal of 86571109 is 90117568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86434209 + 136900 = 9297^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 86571109 - 2⁵ = 86571077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86574109) 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, 43285554 + 43285555.

It is an arithmetic number, because the mean of its divisors is an integer number (43285555).

Almost surely, 2^86571109 is an apocalyptic number.

It is an amenable number.

86571109 is a deficient number, since it is larger than the sum of its proper divisors (1).

86571109 is an equidigital number, since it uses as much as digits as its factorization.

86571109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 86571109 is about 9304.3596770546. The cubic root of 86571109 is about 442.3754257943.

The spelling of 86571109 in words is "eighty-six million, five hundred seventy-one thousand, one hundred nine".