87647 has 8 divisors (see below), whose sum is σ = 105600. Its totient is φ = 71064.

The previous prime is 87643. The next prime is 87649. The reversal of 87647 is 74678.

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

It is not a de Polignac number, because 87647 - 2² = 87643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 87647.

It is not an unprimeable number, because it can be changed into a prime (87641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197 + ... + 462.

It is an arithmetic number, because the mean of its divisors is an integer number (13200).

2⁸⁷⁶⁴⁷ is an apocalyptic number.

87647 is a deficient number, since it is larger than the sum of its proper divisors (17953).

87647 is a wasteful number, since it uses less digits than its factorization.

87647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its digits is 9408, while the sum is 32.

The square root of 87647 is about 296.0523602338. The cubic root of 87647 is about 44.4200474898.

The spelling of 87647 in words is "eighty-seven thousand, six hundred forty-seven".