543391 has 4 divisors (see below), whose sum is σ = 556072. Its totient is φ = 530712.

The previous prime is 543383. The next prime is 543407. The reversal of 543391 is 193345.

543391 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, and also an emirpimes, since its reverse is a distinct semiprime: 193345 = 5 ⋅38669.

It is a cyclic number.

It is not a de Polignac number, because 543391 - 2³ = 543383 is a prime.

It is an Ulam number.

It is a Duffinian number.

543391 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543311) 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, 6276 + ... + 6361.

It is an arithmetic number, because the mean of its divisors is an integer number (139018).

2⁵⁴³³⁹¹ is an apocalyptic number.

543391 is a deficient number, since it is larger than the sum of its proper divisors (12681).

543391 is a wasteful number, since it uses less digits than its factorization.

543391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12680.

The product of its digits is 1620, while the sum is 25.

The square root of 543391 is about 737.1505951975. The cubic root of 543391 is about 81.6026283115.

The spelling of 543391 in words is "five hundred forty-three thousand, three hundred ninety-one".