86139029917 has 2 divisors, whose sum is σ = 86139029918. Its totient is φ = 86139029916.

The previous prime is 86139029887. The next prime is 86139029947. The reversal of 86139029917 is 71992093168.

It is a balanced prime because it is at equal distance from previous prime (86139029887) and next prime (86139029947).

It can be written as a sum of positive squares in only one way, i.e., 52669791001 + 33469238916 = 229499^2 + 182946^2 .

It is a cyclic number.

It is not a de Polignac number, because 86139029917 - 2¹⁵ = 86138997149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86139029947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43069514958 + 43069514959.

It is an arithmetic number, because the mean of its divisors is an integer number (43069514959).

Almost surely, 2^86139029917 is an apocalyptic number.

It is an amenable number.

86139029917 is a deficient number, since it is larger than the sum of its proper divisors (1).

86139029917 is an equidigital number, since it uses as much as digits as its factorization.

86139029917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The spelling of 86139029917 in words is "eighty-six billion, one hundred thirty-nine million, twenty-nine thousand, nine hundred seventeen".