55839943 has 4 divisors (see below), whose sum is σ = 55880608. Its totient is φ = 55799280.

The previous prime is 55839913. The next prime is 55839961. The reversal of 55839943 is 34993855.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55839943 - 2⁵ = 55839911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55839893 and 55839902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55839913) 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, 18198 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (13970152).

Almost surely, 2^55839943 is an apocalyptic number.

55839943 is a deficient number, since it is larger than the sum of its proper divisors (40665).

55839943 is a wasteful number, since it uses less digits than its factorization.

55839943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40664.

The product of its digits is 583200, while the sum is 46.

The square root of 55839943 is about 7472.6128629817. The cubic root of 55839943 is about 382.2213910873.

The spelling of 55839943 in words is "fifty-five million, eight hundred thirty-nine thousand, nine hundred forty-three".