86187091 has 2 divisors, whose sum is σ = 86187092. Its totient is φ = 86187090.

The previous prime is 86187041. The next prime is 86187103. The reversal of 86187091 is 19078168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86187091 - 2⁷ = 86186963 is a prime.

It is not a weakly prime, because it can be changed into another prime (86187011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43093545 + 43093546.

It is an arithmetic number, because the mean of its divisors is an integer number (43093546).

Almost surely, 2^86187091 is an apocalyptic number.

86187091 is a deficient number, since it is larger than the sum of its proper divisors (1).

86187091 is an equidigital number, since it uses as much as digits as its factorization.

86187091 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 86187091 is about 9283.7002859851. The cubic root of 86187091 is about 441.7203499163.

The spelling of 86187091 in words is "eighty-six million, one hundred eighty-seven thousand, ninety-one".