86109871 has 2 divisors, whose sum is σ = 86109872. Its totient is φ = 86109870.

The previous prime is 86109839. The next prime is 86109883. The reversal of 86109871 is 17890168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86109871 - 2⁵ = 86109839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86109571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43054935 + 43054936.

It is an arithmetic number, because the mean of its divisors is an integer number (43054936).

Almost surely, 2^86109871 is an apocalyptic number.

86109871 is a deficient number, since it is larger than the sum of its proper divisors (1).

86109871 is an equidigital number, since it uses as much as digits as its factorization.

86109871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 86109871 is about 9279.5404519836. The cubic root of 86109871 is about 441.5883895611.

It can be divided in two parts, 8610 and 9871, that added together give a palindrome (18481).

The spelling of 86109871 in words is "eighty-six million, one hundred nine thousand, eight hundred seventy-one".