549879 has 16 divisors (see below), whose sum is σ = 842880. Its totient is φ = 315360.

The previous prime is 549877. The next prime is 549883. The reversal of 549879 is 978945.

It is not a de Polignac number, because 549879 - 2¹ = 549877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549879.

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 549879.

It is not an unprimeable number, because it can be changed into a prime (549877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (52680).

2⁵⁴⁹⁸⁷⁹ is an apocalyptic number.

549879 is a deficient number, since it is larger than the sum of its proper divisors (293001).

549879 is a wasteful number, since it uses less digits than its factorization.

549879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910.

The product of its digits is 90720, while the sum is 42.

The square root of 549879 is about 741.5382660389. The cubic root of 549879 is about 81.9261182634.

The spelling of 549879 in words is "five hundred forty-nine thousand, eight hundred seventy-nine".