549538249 has 4 divisors (see below), whose sum is σ = 591810436. Its totient is φ = 507266064.

The previous prime is 549538229. The next prime is 549538259. The reversal of 549538249 is 942835945.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942835945 = 5 ⋅188567189.

It can be written as a sum of positive squares in 2 ways, for example, as 111682624 + 437855625 = 10568^2 + 20925^2 .

It is a cyclic number.

It is not a de Polignac number, because 549538249 - 2¹¹ = 549536201 is a prime.

It is a super-2 number, since 2×549538249² = 603984574227972002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549538229) 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 3 ways as a sum of consecutive naturals, for example, 21136074 + ... + 21136099.

It is an arithmetic number, because the mean of its divisors is an integer number (147952609).

Almost surely, 2^549538249 is an apocalyptic number.

It is an amenable number.

549538249 is a deficient number, since it is larger than the sum of its proper divisors (42272187).

549538249 is a wasteful number, since it uses less digits than its factorization.

549538249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42272186.

The product of its digits is 1555200, while the sum is 49.

The square root of 549538249 is about 23442.2321676072. The cubic root of 549538249 is about 819.0919200924.

The spelling of 549538249 in words is "five hundred forty-nine million, five hundred thirty-eight thousand, two hundred forty-nine".