549993 has 8 divisors (see below), whose sum is σ = 772000. Its totient is φ = 347328.

The previous prime is 549979. The next prime is 550007. The reversal of 549993 is 399945.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (549979) and next prime (550007).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 549993 - 2⁴ = 549977 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4768 + ... + 4881.

It is an arithmetic number, because the mean of its divisors is an integer number (96500).

2⁵⁴⁹⁹⁹³ is an apocalyptic number.

It is an amenable number.

549993 is a deficient number, since it is larger than the sum of its proper divisors (222007).

549993 is a wasteful number, since it uses less digits than its factorization.

549993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671.

The product of its digits is 43740, while the sum is 39.

The square root of 549993 is about 741.6151292955. The cubic root of 549993 is about 81.9317794677.

The spelling of 549993 in words is "five hundred forty-nine thousand, nine hundred ninety-three".