86561005 has 8 divisors (see below), whose sum is σ = 103986432. Its totient is φ = 69173328.

The previous prime is 86560973. The next prime is 86561039. The reversal of 86561005 is 50016568.

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

It is a cyclic number.

It is not a de Polignac number, because 86561005 - 2⁵ = 86560973 is a prime.

It is a super-2 number, since 2×86561005² = 14985615173220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4117 + ... + 13786.

It is an arithmetic number, because the mean of its divisors is an integer number (12998304).

Almost surely, 2^86561005 is an apocalyptic number.

It is an amenable number.

86561005 is a deficient number, since it is larger than the sum of its proper divisors (17425427).

86561005 is a wasteful number, since it uses less digits than its factorization.

86561005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18875.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 86561005 is about 9303.8166899397. The cubic root of 86561005 is about 442.3582147591.

The spelling of 86561005 in words is "eighty-six million, five hundred sixty-one thousand, five".