86571709 has 8 divisors (see below), whose sum is σ = 99719168. Its totient is φ = 73619280.

The previous prime is 86571691. The next prime is 86571721. The reversal of 86571709 is 90717568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86571709 - 2⁵ = 86571677 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 (86571799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47802 + ... + 49579.

It is an arithmetic number, because the mean of its divisors is an integer number (12464896).

Almost surely, 2^86571709 is an apocalyptic number.

It is an amenable number.

86571709 is a deficient number, since it is larger than the sum of its proper divisors (13147459).

86571709 is a wasteful number, since it uses less digits than its factorization.

86571709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97515.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 86571709 is about 9304.3919199483. The cubic root of 86571709 is about 442.3764477852.

The spelling of 86571709 in words is "eighty-six million, five hundred seventy-one thousand, seven hundred nine".