55983 has 4 divisors (see below), whose sum is σ = 74648. Its totient is φ = 37320.

The previous prime is 55967. The next prime is 55987. The reversal of 55983 is 38955.

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

It is not a de Polignac number, because 55983 - 2⁴ = 55967 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55983.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55983.

It is not an unprimeable number, because it can be changed into a prime (55987) 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, 9328 + ... + 9333.

It is an arithmetic number, because the mean of its divisors is an integer number (18662).

2⁵⁵⁹⁸³ is an apocalyptic number.

55983 is a deficient number, since it is larger than the sum of its proper divisors (18665).

55983 is a wasteful number, since it uses less digits than its factorization.

55983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18664.

The product of its digits is 5400, while the sum is 30.

The square root of 55983 is about 236.6072695417. The cubic root of 55983 is about 38.2547518553.

The spelling of 55983 in words is "fifty-five thousand, nine hundred eighty-three".