55973 has 4 divisors (see below), whose sum is σ = 56448. Its totient is φ = 55500.

The previous prime is 55967. The next prime is 55987. The reversal of 55973 is 37955.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 37955 = 5 ⋅7591.

It is a cyclic number.

It is not a de Polignac number, because 55973 - 2⁸ = 55717 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98 + ... + 348.

It is an arithmetic number, because the mean of its divisors is an integer number (14112).

2⁵⁵⁹⁷³ is an apocalyptic number.

It is an amenable number.

55973 is a deficient number, since it is larger than the sum of its proper divisors (475).

55973 is a wasteful number, since it uses less digits than its factorization.

55973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474.

The product of its digits is 4725, while the sum is 29.

The square root of 55973 is about 236.5861365338. The cubic root of 55973 is about 38.2524739596.

The spelling of 55973 in words is "fifty-five thousand, nine hundred seventy-three".