55739 has 4 divisors (see below), whose sum is σ = 56280. Its totient is φ = 55200.

The previous prime is 55733. The next prime is 55763. The reversal of 55739 is 93755.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55739 is a prime.

It is a super-2 number, since 2×55739² = 6213672242, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (55733) 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, 62 + ... + 339.

It is an arithmetic number, because the mean of its divisors is an integer number (14070).

2⁵⁵⁷³⁹ is an apocalyptic number.

55739 is a deficient number, since it is larger than the sum of its proper divisors (541).

55739 is a wasteful number, since it uses less digits than its factorization.

55739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

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

The square root of 55739 is about 236.0910841180. The cubic root of 55739 is about 38.1990935706.

The spelling of 55739 in words is "fifty-five thousand, seven hundred thirty-nine".