549893 has 4 divisors (see below), whose sum is σ = 555660. Its totient is φ = 544128.

The previous prime is 549883. The next prime is 549911. The reversal of 549893 is 398945.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 187489 + 362404 = 433^2 + 602^2 .

It is a cyclic number.

It is not a de Polignac number, because 549893 - 2⁴ = 549877 is a prime.

It is a super-2 number, since 2×549893² = 604764622898, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549833) 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, 2738 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (138915).

2⁵⁴⁹⁸⁹³ is an apocalyptic number.

It is an amenable number.

549893 is a deficient number, since it is larger than the sum of its proper divisors (5767).

549893 is an equidigital number, since it uses as much as digits as its factorization.

549893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5766.

The product of its digits is 38880, while the sum is 38.

The square root of 549893 is about 741.5477058153. The cubic root of 549893 is about 81.9268135412.

The spelling of 549893 in words is "five hundred forty-nine thousand, eight hundred ninety-three".