56739 has 4 divisors (see below), whose sum is σ = 75656. Its totient is φ = 37824.

The previous prime is 56737. The next prime is 56747. The reversal of 56739 is 93765.

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

It is not a de Polignac number, because 56739 - 2¹ = 56737 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (56731) 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, 9454 + ... + 9459.

It is an arithmetic number, because the mean of its divisors is an integer number (18914).

2⁵⁶⁷³⁹ is an apocalyptic number.

56739 is a deficient number, since it is larger than the sum of its proper divisors (18917).

56739 is a wasteful number, since it uses less digits than its factorization.

56739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18916.

The product of its digits is 5670, while the sum is 30.

The square root of 56739 is about 238.1994962211. The cubic root of 56739 is about 38.4261811474.

It can be divided in two parts, 567 and 39, that added together give a palindrome (606).

The spelling of 56739 in words is "fifty-six thousand, seven hundred thirty-nine".