53643 has 4 divisors (see below), whose sum is σ = 71528. Its totient is φ = 35760.

The previous prime is 53639. The next prime is 53653. The reversal of 53643 is 34635.

53643 is nontrivially palindromic in base 2.

53643 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 53643 - 2² = 53639 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (53623) 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, 8938 + ... + 8943.

It is an arithmetic number, because the mean of its divisors is an integer number (17882).

2⁵³⁶⁴³ is an apocalyptic number.

53643 is a deficient number, since it is larger than the sum of its proper divisors (17885).

53643 is a wasteful number, since it uses less digits than its factorization.

53643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17884.

The product of its digits is 1080, while the sum is 21.

The square root of 53643 is about 231.6095852939. The cubic root of 53643 is about 37.7141524821.

It can be divided in two parts, 53 and 643, that added together give a palindrome (696).

The spelling of 53643 in words is "fifty-three thousand, six hundred forty-three".