87047 has 4 divisors (see below), whose sum is σ = 88536. Its totient is φ = 85560.

The previous prime is 87041. The next prime is 87049. The reversal of 87047 is 74078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74078 = 2 ⋅37039.

It is a cyclic number.

It is not a de Polignac number, because 87047 - 2¹⁴ = 70663 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 (87041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653 + ... + 774.

It is an arithmetic number, because the mean of its divisors is an integer number (22134).

2⁸⁷⁰⁴⁷ is an apocalyptic number.

87047 is a deficient number, since it is larger than the sum of its proper divisors (1489).

87047 is a wasteful number, since it uses less digits than its factorization.

87047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 87047 is about 295.0372857793. The cubic root of 87047 is about 44.3184540616.

The spelling of 87047 in words is "eighty-seven thousand, forty-seven".