200728009 has 2 divisors, whose sum is σ = 200728010. Its totient is φ = 200728008.

The previous prime is 200727979. The next prime is 200728037. The reversal of 200728009 is 900827002.

It is an a-pointer prime, because the next prime (200728037) can be obtained adding 200728009 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120231225 + 80496784 = 10965^2 + 8972^2 .

It is a cyclic number.

It is not a de Polignac number, because 200728009 - 2⁵ = 200727977 is a prime.

It is not a weakly prime, because it can be changed into another prime (200728709) 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, 100364004 + 100364005.

It is an arithmetic number, because the mean of its divisors is an integer number (100364005).

Almost surely, 2^200728009 is an apocalyptic number.

It is an amenable number.

200728009 is a deficient number, since it is larger than the sum of its proper divisors (1).

200728009 is an equidigital number, since it uses as much as digits as its factorization.

200728009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 200728009 is about 14167.8512485133. The cubic root of 200728009 is about 585.5122588332.

The spelling of 200728009 in words is "two hundred million, seven hundred twenty-eight thousand, nine".