86193492181 has 2 divisors, whose sum is σ = 86193492182. Its totient is φ = 86193492180.

The previous prime is 86193492103. The next prime is 86193492221. The reversal of 86193492181 is 18129439168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80013173956 + 6180318225 = 282866^2 + 78615^2 .

It is a cyclic number.

It is not a de Polignac number, because 86193492181 - 2⁷ = 86193492053 is a prime.

It is a super-2 number, since 2×86193492181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86193490181) 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, 43096746090 + 43096746091.

It is an arithmetic number, because the mean of its divisors is an integer number (43096746091).

Almost surely, 2^86193492181 is an apocalyptic number.

It is an amenable number.

86193492181 is a deficient number, since it is larger than the sum of its proper divisors (1).

86193492181 is an equidigital number, since it uses as much as digits as its factorization.

86193492181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 52.

The spelling of 86193492181 in words is "eighty-six billion, one hundred ninety-three million, four hundred ninety-two thousand, one hundred eighty-one".