552009209 has 2 divisors, whose sum is σ = 552009210. Its totient is φ = 552009208.

The previous prime is 552009203. The next prime is 552009217. The reversal of 552009209 is 902900255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 467424400 + 84584809 = 21620^2 + 9197^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-552009209 is a prime.

It is not a weakly prime, because it can be changed into another prime (552009203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276004604 + 276004605.

It is an arithmetic number, because the mean of its divisors is an integer number (276004605).

Almost surely, 2^552009209 is an apocalyptic number.

It is an amenable number.

552009209 is a deficient number, since it is larger than the sum of its proper divisors (1).

552009209 is an equidigital number, since it uses as much as digits as its factorization.

552009209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 552009209 is about 23494.8762286589. The cubic root of 552009209 is about 820.3177476688.

The spelling of 552009209 in words is "five hundred fifty-two million, nine thousand, two hundred nine".