86647009 has 4 divisors (see below), whose sum is σ = 86679216. Its totient is φ = 86614804.

The previous prime is 86646961. The next prime is 86647019. The reversal of 86647009 is 90074668.

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 a cyclic number.

It is not a de Polignac number, because 86647009 - 2⁷ = 86646881 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86647019) 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, 11659 + ... + 17584.

It is an arithmetic number, because the mean of its divisors is an integer number (21669804).

Almost surely, 2^86647009 is an apocalyptic number.

It is an amenable number.

86647009 is a deficient number, since it is larger than the sum of its proper divisors (32207).

86647009 is a wasteful number, since it uses less digits than its factorization.

86647009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32206.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 86647009 is about 9308.4375165760. The cubic root of 86647009 is about 442.5046701711.

The spelling of 86647009 in words is "eighty-six million, six hundred forty-seven thousand, nine".