43423 has 4 divisors (see below), whose sum is σ = 43848. Its totient is φ = 43000.

The previous prime is 43411. The next prime is 43427. The reversal of 43423 is 32434.

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: 32434 = 2 ⋅16217.

It is a cyclic number.

It is not a de Polignac number, because 43423 - 2⁵ = 43391 is a prime.

It is a Duffinian number.

43423 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 43397 and 43406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43427) 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, 48 + ... + 298.

It is an arithmetic number, because the mean of its divisors is an integer number (10962).

2⁴³⁴²³ is an apocalyptic number.

43423 is a deficient number, since it is larger than the sum of its proper divisors (425).

43423 is a wasteful number, since it uses less digits than its factorization.

43423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424.

The product of its digits is 288, while the sum is 16.

The square root of 43423 is about 208.3818610148. The cubic root of 43423 is about 35.1484848200.

Adding to 43423 its reverse (32434), we get a palindrome (75857).

The spelling of 43423 in words is "forty-three thousand, four hundred twenty-three", and thus it is an iban number.