86171717 has 4 divisors (see below), whose sum is σ = 86447340. Its totient is φ = 85896096.

The previous prime is 86171681. The next prime is 86171737. The reversal of 86171717 is 71717168.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5997601 + 80174116 = 2449^2 + 8954^2 .

It is a cyclic number.

It is not a de Polignac number, because 86171717 - 2⁸ = 86171461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86171737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137342 + ... + 137967.

It is an arithmetic number, because the mean of its divisors is an integer number (21611835).

Almost surely, 2^86171717 is an apocalyptic number.

It is an amenable number.

86171717 is a deficient number, since it is larger than the sum of its proper divisors (275623).

86171717 is a wasteful number, since it uses less digits than its factorization.

86171717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275622.

The product of its digits is 16464, while the sum is 38.

The square root of 86171717 is about 9282.8722386985. The cubic root of 86171717 is about 441.6940837535.

The spelling of 86171717 in words is "eighty-six million, one hundred seventy-one thousand, seven hundred seventeen".