55747 has 4 divisors (see below), whose sum is σ = 56376. Its totient is φ = 55120.

The previous prime is 55733. The next prime is 55763. The reversal of 55747 is 74755.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74755 = 5 ⋅14951.

It is a cyclic number.

It is not a de Polignac number, because 55747 - 2⁷ = 55619 is a prime.

It is a Duffinian number.

55747 is a lucky number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (55717) 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, 154 + ... + 367.

It is an arithmetic number, because the mean of its divisors is an integer number (14094).

2⁵⁵⁷⁴⁷ is an apocalyptic number.

55747 is a deficient number, since it is larger than the sum of its proper divisors (629).

55747 is a wasteful number, since it uses less digits than its factorization.

55747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628.

The product of its digits is 4900, while the sum is 28.

The square root of 55747 is about 236.1080261236. The cubic root of 55747 is about 38.2009210052.

The spelling of 55747 in words is "fifty-five thousand, seven hundred forty-seven".