549943 has 2 divisors, whose sum is σ = 549944. Its totient is φ = 549942.

The previous prime is 549937. The next prime is 549949. The reversal of 549943 is 349945.

It is a balanced prime because it is at equal distance from previous prime (549937) and next prime (549949).

It is a cyclic number.

It is not a de Polignac number, because 549943 - 2⁵ = 549911 is a prime.

549943 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 549899 and 549908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274971 + 274972.

It is an arithmetic number, because the mean of its divisors is an integer number (274972).

2⁵⁴⁹⁹⁴³ is an apocalyptic number.

549943 is a deficient number, since it is larger than the sum of its proper divisors (1).

549943 is an equidigital number, since it uses as much as digits as its factorization.

549943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 549943 is about 741.5814183217. The cubic root of 549943 is about 81.9292965797.

The spelling of 549943 in words is "five hundred forty-nine thousand, nine hundred forty-three".