543965 has 4 divisors (see below), whose sum is σ = 652764. Its totient is φ = 435168.

The previous prime is 543929. The next prime is 543967. The reversal of 543965 is 569345.

It is a happy number.

543965 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.

It can be written as a sum of positive squares in 2 ways, for example, as 267289 + 276676 = 517^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 543965 - 2⁶ = 543901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543967) 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, 54392 + ... + 54401.

It is an arithmetic number, because the mean of its divisors is an integer number (163191).

2⁵⁴³⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

543965 is a deficient number, since it is larger than the sum of its proper divisors (108799).

543965 is a wasteful number, since it uses less digits than its factorization.

543965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108798.

The product of its digits is 16200, while the sum is 32.

The square root of 543965 is about 737.5398294330. The cubic root of 543965 is about 81.6313512909.

The spelling of 543965 in words is "five hundred forty-three thousand, nine hundred sixty-five".