549869 has 8 divisors (see below), whose sum is σ = 579360. Its totient is φ = 521136.

The previous prime is 549863. The next prime is 549877. The reversal of 549869 is 968945.

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

It is a cyclic number.

It is not a de Polignac number, because 549869 - 2¹² = 545773 is a prime.

It is a super-2 number, since 2×549869² = 604711834322, which contains 22 as substring.

It is a Duffinian 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 549869.

It is not an unprimeable number, because it can be changed into a prime (549863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1802 + ... + 2084.

It is an arithmetic number, because the mean of its divisors is an integer number (72420).

2⁵⁴⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

549869 is a deficient number, since it is larger than the sum of its proper divisors (29491).

549869 is a wasteful number, since it uses less digits than its factorization.

549869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its digits is 77760, while the sum is 41.

The square root of 549869 is about 741.5315232679. The cubic root of 549869 is about 81.9256216292.

The spelling of 549869 in words is "five hundred forty-nine thousand, eight hundred sixty-nine".