87847 has 4 divisors (see below), whose sum is σ = 88776. Its totient is φ = 86920.

The previous prime is 87833. The next prime is 87853. The reversal of 87847 is 74878.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 87847 - 2⁷ = 87719 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 (87877) 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, 304 + ... + 517.

It is an arithmetic number, because the mean of its divisors is an integer number (22194).

2⁸⁷⁸⁴⁷ is an apocalyptic number.

87847 is a deficient number, since it is larger than the sum of its proper divisors (929).

87847 is a wasteful number, since it uses less digits than its factorization.

87847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928.

The product of its digits is 12544, while the sum is 34.

The square root of 87847 is about 296.3899458484. The cubic root of 87847 is about 44.4538089064.

The spelling of 87847 in words is "eighty-seven thousand, eight hundred forty-seven".