87447 has 8 divisors (see below), whose sum is σ = 118144. Its totient is φ = 57528.

The previous prime is 87443. The next prime is 87473. The reversal of 87447 is 74478.

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

It is not a de Polignac number, because 87447 - 2² = 87443 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 (87443) 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, 168 + ... + 450.

It is an arithmetic number, because the mean of its divisors is an integer number (14768).

2⁸⁷⁴⁴⁷ is an apocalyptic number.

87447 is a deficient number, since it is larger than the sum of its proper divisors (30697).

87447 is a wasteful number, since it uses less digits than its factorization.

87447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its digits is 6272, while the sum is 30.

The square root of 87447 is about 295.7143892339. The cubic root of 87447 is about 44.3862346744.

The spelling of 87447 in words is "eighty-seven thousand, four hundred forty-seven".