549689 has 8 divisors (see below), whose sum is σ = 661440. Its totient is φ = 446256.

The previous prime is 549683. The next prime is 549691. The reversal of 549689 is 986945.

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 549689 - 2¹⁶ = 484153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549683) 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, 1934 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (82680).

2⁵⁴⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

549689 is a deficient number, since it is larger than the sum of its proper divisors (111751).

549689 is a wasteful number, since it uses less digits than its factorization.

549689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159.

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

The square root of 549689 is about 741.4101429034. The cubic root of 549689 is about 81.9166811838.

It can be divided in two parts, 5 and 49689, that added together give a palindrome (49694).

The spelling of 549689 in words is "five hundred forty-nine thousand, six hundred eighty-nine".