549906 has 16 divisors (see below), whose sum is σ = 1257024. Its totient is φ = 157104.

The previous prime is 549883. The next prime is 549911. The reversal of 549906 is 609945.

It is a happy number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549906.

It is an unprimeable number.

549906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6505 + ... + 6588.

It is an arithmetic number, because the mean of its divisors is an integer number (78564).

2⁵⁴⁹⁹⁰⁶ is an apocalyptic number.

549906 is an abundant number, since it is smaller than the sum of its proper divisors (707118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

549906 is a wasteful number, since it uses less digits than its factorization.

549906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13105.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 549906 is about 741.5564712144. The cubic root of 549906 is about 81.9274591457.

The spelling of 549906 in words is "five hundred forty-nine thousand, nine hundred six".