549242945 has 4 divisors (see below), whose sum is σ = 659091540. Its totient is φ = 439394352.

The previous prime is 549242933. The next prime is 549243031.

549242945 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 170668096 + 378574849 = 13064^2 + 19457^2 .

It is a cyclic number.

It is not a de Polignac number, because 549242945 - 2¹² = 549238849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 549242896 and 549242905.

It is an unprimeable number.

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, 54924290 + ... + 54924299.

It is an arithmetic number, because the mean of its divisors is an integer number (164772885).

Almost surely, 2^549242945 is an apocalyptic number.

It is an amenable number.

549242945 is a deficient number, since it is larger than the sum of its proper divisors (109848595).

549242945 is a wasteful number, since it uses less digits than its factorization.

549242945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109848594.

The product of its digits is 518400, while the sum is 44.

The square root of 549242945 is about 23435.9327742678. The cubic root of 549242945 is about 818.9451760092.

The spelling of 549242945 in words is "five hundred forty-nine million, two hundred forty-two thousand, nine hundred forty-five".