86171239417 has 2 divisors, whose sum is σ = 86171239418. Its totient is φ = 86171239416.

The previous prime is 86171239403. The next prime is 86171239477. The reversal of 86171239417 is 71493217168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64696974736 + 21474264681 = 254356^2 + 146541^2 .

It is a cyclic number.

It is not a de Polignac number, because 86171239417 - 2¹⁹ = 86170715129 is a prime.

It is not a weakly prime, because it can be changed into another prime (86171239477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43085619708 + 43085619709.

It is an arithmetic number, because the mean of its divisors is an integer number (43085619709).

Almost surely, 2^86171239417 is an apocalyptic number.

It is an amenable number.

86171239417 is a deficient number, since it is larger than the sum of its proper divisors (1).

86171239417 is an equidigital number, since it uses as much as digits as its factorization.

86171239417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The spelling of 86171239417 in words is "eighty-six billion, one hundred seventy-one million, two hundred thirty-nine thousand, four hundred seventeen".