86511091 has 2 divisors, whose sum is σ = 86511092. Its totient is φ = 86511090.

The previous prime is 86511077. The next prime is 86511121. The reversal of 86511091 is 19011568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86511091 - 2¹¹ = 86509043 is a prime.

It is a Chen prime.

It is equal to p_5026459 and since 86511091 and 5026459 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (86511001) 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, 43255545 + 43255546.

It is an arithmetic number, because the mean of its divisors is an integer number (43255546).

Almost surely, 2^86511091 is an apocalyptic number.

86511091 is a deficient number, since it is larger than the sum of its proper divisors (1).

86511091 is an equidigital number, since it uses as much as digits as its factorization.

86511091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 86511091 is about 9301.1338556114. The cubic root of 86511091 is about 442.2731721802.

The spelling of 86511091 in words is "eighty-six million, five hundred eleven thousand, ninety-one".