55789 has 4 divisors (see below), whose sum is σ = 57024. Its totient is φ = 54556.

The previous prime is 55787. The next prime is 55793. The reversal of 55789 is 98755.

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 an emirpimes, since its reverse is a distinct semiprime: 98755 = 5 ⋅19751.

It is a cyclic number.

It is not a de Polignac number, because 55789 - 2¹ = 55787 is a prime.

It is a super-2 number, since 2×55789² = 6224825042, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55787) 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, 547 + ... + 640.

It is an arithmetic number, because the mean of its divisors is an integer number (14256).

2⁵⁵⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

55789 is a deficient number, since it is larger than the sum of its proper divisors (1235).

55789 is a wasteful number, since it uses less digits than its factorization.

55789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234.

The product of its digits is 12600, while the sum is 34.

The square root of 55789 is about 236.1969517161. The cubic root of 55789 is about 38.2105121696.

Subtracting from 55789 its sum of digits (34), we obtain a palindrome (55755).

It can be divided in two parts, 557 and 89, that added together give a palindrome (646).

The spelling of 55789 in words is "fifty-five thousand, seven hundred eighty-nine".