549959 has 4 divisors (see below), whose sum is σ = 553800. Its totient is φ = 546120.

The previous prime is 549949. The next prime is 549977. The reversal of 549959 is 959945.

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

It is a cyclic number.

It is not a de Polignac number, because 549959 - 2⁴ = 549943 is a prime.

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 (549949) 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, 1697 + ... + 1994.

It is an arithmetic number, because the mean of its divisors is an integer number (138450).

2⁵⁴⁹⁹⁵⁹ is an apocalyptic number.

549959 is a deficient number, since it is larger than the sum of its proper divisors (3841).

549959 is a wasteful number, since it uses less digits than its factorization.

549959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840.

The product of its digits is 72900, while the sum is 41.

The square root of 549959 is about 741.5922060000. The cubic root of 549959 is about 81.9300911203.

The spelling of 549959 in words is "five hundred forty-nine thousand, nine hundred fifty-nine".