55739239 has 4 divisors (see below), whose sum is σ = 56094424. Its totient is φ = 55384056.

The previous prime is 55739153. The next prime is 55739249. The reversal of 55739239 is 93293755.

55739239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93293755 = 5 ⋅18658751.

It is a cyclic number.

It is not a de Polignac number, because 55739239 - 2⁷ = 55739111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55739195 and 55739204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55739249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177357 + ... + 177670.

It is an arithmetic number, because the mean of its divisors is an integer number (14023606).

Almost surely, 2^55739239 is an apocalyptic number.

55739239 is a deficient number, since it is larger than the sum of its proper divisors (355185).

55739239 is a wasteful number, since it uses less digits than its factorization.

55739239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355184.

The product of its digits is 255150, while the sum is 43.

The square root of 55739239 is about 7465.8716168978. The cubic root of 55739239 is about 381.9914816773.

The spelling of 55739239 in words is "fifty-five million, seven hundred thirty-nine thousand, two hundred thirty-nine".