543623 has 4 divisors (see below), whose sum is σ = 546840. Its totient is φ = 540408.

The previous prime is 543617. The next prime is 543637. The reversal of 543623 is 326345.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326345 = 5 ⋅65269.

It is a cyclic number.

It is not a de Polignac number, because 543623 - 2⁴ = 543607 is a prime.

It is a super-2 number, since 2×543623² = 591051932258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543223) 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, 1340 + ... + 1697.

It is an arithmetic number, because the mean of its divisors is an integer number (136710).

2⁵⁴³⁶²³ is an apocalyptic number.

543623 is a deficient number, since it is larger than the sum of its proper divisors (3217).

543623 is a wasteful number, since it uses less digits than its factorization.

543623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216.

The product of its digits is 2160, while the sum is 23.

The square root of 543623 is about 737.3079410938. The cubic root of 543623 is about 81.6142400337.

Adding to 543623 its reverse (326345), we get a palindrome (869968).

The spelling of 543623 in words is "five hundred forty-three thousand, six hundred twenty-three".