200126609 has 2 divisors, whose sum is σ = 200126610. Its totient is φ = 200126608.

The previous prime is 200126603. The next prime is 200126623. The reversal of 200126609 is 906621002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151782400 + 48344209 = 12320^2 + 6953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200126609 is a prime.

It is not a weakly prime, because it can be changed into another prime (200126603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100063304 + 100063305.

It is an arithmetic number, because the mean of its divisors is an integer number (100063305).

Almost surely, 2^200126609 is an apocalyptic number.

It is an amenable number.

200126609 is a deficient number, since it is larger than the sum of its proper divisors (1).

200126609 is an equidigital number, since it uses as much as digits as its factorization.

200126609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 200126609 is about 14146.6112196526. The cubic root of 200126609 is about 584.9269239326.

The spelling of 200126609 in words is "two hundred million, one hundred twenty-six thousand, six hundred nine".