523443 has 4 divisors (see below), whose sum is σ = 697928. Its totient is φ = 348960.

The previous prime is 523433. The next prime is 523459. The reversal of 523443 is 344325.

It is a happy number.

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

It is not a de Polignac number, because 523443 - 2⁴ = 523427 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523403) 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, 87238 + ... + 87243.

It is an arithmetic number, because the mean of its divisors is an integer number (174482).

2⁵²³⁴⁴³ is an apocalyptic number.

523443 is a deficient number, since it is larger than the sum of its proper divisors (174485).

523443 is a wasteful number, since it uses less digits than its factorization.

523443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174484.

The product of its digits is 1440, while the sum is 21.

The square root of 523443 is about 723.4936074355. The cubic root of 523443 is about 80.5916038599.

Adding to 523443 its reverse (344325), we get a palindrome (867768).

The spelling of 523443 in words is "five hundred twenty-three thousand, four hundred forty-three".