543091 has 4 divisors (see below), whose sum is σ = 553392. Its totient is φ = 532792.

The previous prime is 543061. The next prime is 543097. The reversal of 543091 is 190345.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190345 = 5 ⋅38069.

It is a cyclic number.

It is not a de Polignac number, because 543091 - 2⁹ = 542579 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (543097) 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, 5071 + ... + 5176.

It is an arithmetic number, because the mean of its divisors is an integer number (138348).

2⁵⁴³⁰⁹¹ is an apocalyptic number.

543091 is a deficient number, since it is larger than the sum of its proper divisors (10301).

543091 is a wasteful number, since it uses less digits than its factorization.

543091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10300.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 543091 is about 736.9470808681. The cubic root of 543091 is about 81.5876082522.

The spelling of 543091 in words is "five hundred forty-three thousand, ninety-one".