86472779852117 has 2 divisors, whose sum is σ = 86472779852118. Its totient is φ = 86472779852116.

The previous prime is 86472779852027. The next prime is 86472779852171. The reversal of 86472779852117 is 71125897727468.

Together with next prime (86472779852171) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74798524120996 + 11674255731121 = 8648614^2 + 3416761^2 .

It is a cyclic number.

It is not a de Polignac number, because 86472779852117 - 2¹⁰ = 86472779851093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86472779852177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43236389926058 + 43236389926059.

It is an arithmetic number, because the mean of its divisors is an integer number (43236389926059).

Almost surely, 2^{86472779852117} is an apocalyptic number.

It is an amenable number.

86472779852117 is a deficient number, since it is larger than the sum of its proper divisors (1).

86472779852117 is an equidigital number, since it uses as much as digits as its factorization.

86472779852117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663828480, while the sum is 74.

The spelling of 86472779852117 in words is "eighty-six trillion, four hundred seventy-two billion, seven hundred seventy-nine million, eight hundred fifty-two thousand, one hundred seventeen".