550752309 has 24 divisors (see below), whose sum is σ = 814794552. Its totient is φ = 358350720.

The previous prime is 550752287. The next prime is 550752329. The reversal of 550752309 is 903257055.

550752309 is a `hidden beast` number, since 550 + 75 + 2 + 30 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 285779025 + 264973284 = 16905^2 + 16278^2 .

It is not a de Polignac number, because 550752309 - 2⁸ = 550752053 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550752329) 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 in 23 ways as a sum of consecutive naturals, for example, 91039 + ... + 96899.

It is an arithmetic number, because the mean of its divisors is an integer number (33949773).

Almost surely, 2^550752309 is an apocalyptic number.

It is an amenable number.

550752309 is a deficient number, since it is larger than the sum of its proper divisors (264042243).

550752309 is a wasteful number, since it uses less digits than its factorization.

550752309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117 (or 6114 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 36.

The square root of 550752309 is about 23468.1125998662. The cubic root of 550752309 is about 819.6946657174.

The spelling of 550752309 in words is "five hundred fifty million, seven hundred fifty-two thousand, three hundred nine".