86171309 has 4 divisors (see below), whose sum is σ = 98481504. Its totient is φ = 73861116.

The previous prime is 86171303. The next prime is 86171333. The reversal of 86171309 is 90317168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 86171309 - 2²⁰ = 85122733 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 (86171303) 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, 6155087 + ... + 6155100.

It is an arithmetic number, because the mean of its divisors is an integer number (24620376).

Almost surely, 2^86171309 is an apocalyptic number.

It is an amenable number.

86171309 is a deficient number, since it is larger than the sum of its proper divisors (12310195).

86171309 is a wasteful number, since it uses less digits than its factorization.

86171309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12310194.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 86171309 is about 9282.8502627156. The cubic root of 86171309 is about 441.6933866513.

The spelling of 86171309 in words is "eighty-six million, one hundred seventy-one thousand, three hundred nine".