45643 has 4 divisors (see below), whose sum is σ = 49168.
Its totient is φ = 42120.
The previous prime is 45641. The next prime is 45659. The reversal of 45643 is 34654.
45643 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: 34654 = 2 ⋅17327.
It is a Wieferich number.
It is not a de Polignac number, because 45643 - 21 = 45641 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (45641) 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, 1743 + ... + 1768.
It is an arithmetic number, because the mean of its divisors is an integer number (12292).
245643 is an apocalyptic number.
45643 is a deficient number, since it is larger than the sum of its proper divisors (3525).
45643 is a wasteful number, since it uses less digits than its factorization.
45643 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3524.
The product of its digits is 1440, while the sum is 22.
The square root of 45643 is about 213.6422242910.
The cubic root of 45643 is about 35.7375459904.
The spelling of 45643 in words is "forty-five thousand, six hundred forty-three".