54687 has 4 divisors (see below), whose sum is σ = 72920. Its totient is φ = 36456.

The previous prime is 54679. The next prime is 54709. The reversal of 54687 is 78645.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 54687 - 2³ = 54679 is a prime.

It is a D-number.

It is a Duffinian number.

54687 is a lucky number.

It is a nialpdrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54617) 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 3 ways as a sum of consecutive naturals, for example, 9112 + ... + 9117.

It is an arithmetic number, because the mean of its divisors is an integer number (18230).

2⁵⁴⁶⁸⁷ is an apocalyptic number.

54687 is a deficient number, since it is larger than the sum of its proper divisors (18233).

54687 is a wasteful number, since it uses less digits than its factorization.

54687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18232.

The product of its digits is 6720, while the sum is 30.

The square root of 54687 is about 233.8525176260. The cubic root of 54687 is about 37.9572464685.

It can be divided in two parts, 54 and 687, that added together give a triangular number (741 = T₃₈).

The spelling of 54687 in words is "fifty-four thousand, six hundred eighty-seven".