549727645 has 4 divisors (see below), whose sum is σ = 659673180. Its totient is φ = 439782112.

The previous prime is 549727639. The next prime is 549727667. The reversal of 549727645 is 546727945.

It is a happy number.

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 263542756 + 286184889 = 16234^2 + 16917^2 .

It is a cyclic number.

It is not a de Polignac number, because 549727645 - 2³ = 549727637 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 54972760 + ... + 54972769.

It is an arithmetic number, because the mean of its divisors is an integer number (164918295).

Almost surely, 2^549727645 is an apocalyptic number.

It is an amenable number.

549727645 is a deficient number, since it is larger than the sum of its proper divisors (109945535).

549727645 is a wasteful number, since it uses less digits than its factorization.

549727645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109945534.

The product of its digits is 2116800, while the sum is 49.

The square root of 549727645 is about 23446.2714519814. The cubic root of 549727645 is about 819.1860081230.

The spelling of 549727645 in words is "five hundred forty-nine million, seven hundred twenty-seven thousand, six hundred forty-five".