549209404 has 6 divisors (see below), whose sum is σ = 961116464. Its totient is φ = 274604700.

The previous prime is 549209399. The next prime is 549209407. The reversal of 549209404 is 404902945.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549209407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68651172 + ... + 68651179.

Almost surely, 2^549209404 is an apocalyptic number.

It is an amenable number.

549209404 is a deficient number, since it is larger than the sum of its proper divisors (411907060).

549209404 is a wasteful number, since it uses less digits than its factorization.

549209404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137302355 (or 137302353 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 549209404 is about 23435.2171741591. The cubic root of 549209404 is about 818.9285053054.

The spelling of 549209404 in words is "five hundred forty-nine million, two hundred nine thousand, four hundred four".