200120209 has 8 divisors (see below), whose sum is σ = 215890920. Its totient is φ = 184793856.

The previous prime is 200120203. The next prime is 200120251. The reversal of 200120209 is 902021002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 96589584 + 103530625 = 9828^2 + 10175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 200120209 - 2³ = 200120201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200120192 and 200120201.

It is not an unprimeable number, because it can be changed into a prime (200120201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110154 + ... + 111955.

It is an arithmetic number, because the mean of its divisors is an integer number (26986365).

Almost surely, 2^200120209 is an apocalyptic number.

It is an amenable number.

200120209 is a deficient number, since it is larger than the sum of its proper divisors (15770711).

200120209 is a wasteful number, since it uses less digits than its factorization.

200120209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222179.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 200120209 is about 14146.3850152610. The cubic root of 200120209 is about 584.9206885928.

It can be divided in two parts, 200 and 120209, that added together give a square (120409 = 347²).

The spelling of 200120209 in words is "two hundred million, one hundred twenty thousand, two hundred nine".