549539 has 4 divisors (see below), whose sum is σ = 573456. Its totient is φ = 525624.

The previous prime is 549533. The next prime is 549547. The reversal of 549539 is 935945.

549539 = T₂₀₇ + T₂₀₈ + ... + T₂₂₉.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935945 = 5 ⋅187189.

It is a cyclic number.

It is not a de Polignac number, because 549539 - 2¹² = 545443 is a prime.

It is a super-2 number, since 2×549539² = 603986225042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 549499 and 549508.

It is not an unprimeable number, because it can be changed into a prime (549533) 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, 11924 + ... + 11969.

It is an arithmetic number, because the mean of its divisors is an integer number (143364).

2⁵⁴⁹⁵³⁹ is an apocalyptic number.

549539 is a deficient number, since it is larger than the sum of its proper divisors (23917).

549539 is a wasteful number, since it uses less digits than its factorization.

549539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23916.

The product of its digits is 24300, while the sum is 35.

The square root of 549539 is about 741.3089774176. The cubic root of 549539 is about 81.9092293216.

The spelling of 549539 in words is "five hundred forty-nine thousand, five hundred thirty-nine".