54639 has 12 divisors (see below), whose sum is σ = 85176. Its totient is φ = 33552.

The previous prime is 54631. The next prime is 54647. The reversal of 54639 is 93645.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (54631) and next prime (54647).

It is not a de Polignac number, because 54639 - 2³ = 54631 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54631) 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 11 ways as a sum of consecutive naturals, for example, 117 + ... + 350.

It is an arithmetic number, because the mean of its divisors is an integer number (7098).

2⁵⁴⁶³⁹ is an apocalyptic number.

54639 is a deficient number, since it is larger than the sum of its proper divisors (30537).

54639 is a wasteful number, since it uses less digits than its factorization.

54639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 483 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 54639 is about 233.7498663101. The cubic root of 54639 is about 37.9461379104.

It can be divided in two parts, 546 and 39, that added together give a palindrome (585).

The spelling of 54639 in words is "fifty-four thousand, six hundred thirty-nine".