545943 has 4 divisors (see below), whose sum is σ = 727928. Its totient is φ = 363960.

The previous prime is 545939. The next prime is 545947. The reversal of 545943 is 349545.

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

It is an interprime number because it is at equal distance from previous prime (545939) and next prime (545947).

It is not a de Polignac number, because 545943 - 2² = 545939 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545947) 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, 90988 + ... + 90993.

It is an arithmetic number, because the mean of its divisors is an integer number (181982).

2⁵⁴⁵⁹⁴³ is an apocalyptic number.

545943 is a deficient number, since it is larger than the sum of its proper divisors (181985).

545943 is a wasteful number, since it uses less digits than its factorization.

545943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181984.

The product of its digits is 10800, while the sum is 30.

The square root of 545943 is about 738.8795571675. The cubic root of 545943 is about 81.7301759673.

The spelling of 545943 in words is "five hundred forty-five thousand, nine hundred forty-three".