86115811 has 2 divisors, whose sum is σ = 86115812. Its totient is φ = 86115810.

The previous prime is 86115803. The next prime is 86115823. The reversal of 86115811 is 11851168.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86115811 - 2³ = 86115803 is a prime.

It is not a weakly prime, because it can be changed into another prime (86112811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43057905 + 43057906.

It is an arithmetic number, because the mean of its divisors is an integer number (43057906).

Almost surely, 2^86115811 is an apocalyptic number.

86115811 is a deficient number, since it is larger than the sum of its proper divisors (1).

86115811 is an equidigital number, since it uses as much as digits as its factorization.

86115811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 31.

The square root of 86115811 is about 9279.8605054171. The cubic root of 86115811 is about 441.5985431578.

Adding to 86115811 its reverse (11851168), we get a palindrome (97966979).

The spelling of 86115811 in words is "eighty-six million, one hundred fifteen thousand, eight hundred eleven".