86544209 has 8 divisors (see below), whose sum is σ = 88581120. Its totient is φ = 84526416.

The previous prime is 86544191. The next prime is 86544217. The reversal of 86544209 is 90244568.

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 86544209 - 2¹⁶ = 86478673 is a prime.

It is a super-2 number, since 2×86544209² = 14979800222871362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86544109) 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, 4592 + ... + 13934.

It is an arithmetic number, because the mean of its divisors is an integer number (11072640).

Almost surely, 2^86544209 is an apocalyptic number.

It is an amenable number.

86544209 is a deficient number, since it is larger than the sum of its proper divisors (2036911).

86544209 is a wasteful number, since it uses less digits than its factorization.

86544209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9559.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 86544209 is about 9302.9140058371. The cubic root of 86544209 is about 442.3296016857.

The spelling of 86544209 in words is "eighty-six million, five hundred forty-four thousand, two hundred nine".