394543 has 4 divisors (see below), whose sum is σ = 404208. Its totient is φ = 384880.

The previous prime is 394529. The next prime is 394549. The reversal of 394543 is 345493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345493 = 439 ⋅787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394543 is a prime.

It is a Duffinian number.

394543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394549) 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, 4771 + ... + 4852.

It is an arithmetic number, because the mean of its divisors is an integer number (101052).

2³⁹⁴⁵⁴³ is an apocalyptic number.

394543 is a deficient number, since it is larger than the sum of its proper divisors (9665).

394543 is an equidigital number, since it uses as much as digits as its factorization.

394543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9664.

The product of its digits is 6480, while the sum is 28.

The square root of 394543 is about 628.1265796000. The cubic root of 394543 is about 73.3440319561.

The spelling of 394543 in words is "three hundred ninety-four thousand, five hundred forty-three".