210000209 has 8 divisors (see below), whose sum is σ = 213004512. Its totient is φ = 207007360.

The previous prime is 210000199. The next prime is 210000239. The reversal of 210000209 is 902000012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210000209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210000193 and 210000202.

It is not an unprimeable number, because it can be changed into a prime (210000239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38177 + ... + 43329.

It is an arithmetic number, because the mean of its divisors is an integer number (26625564).

Almost surely, 2^210000209 is an apocalyptic number.

It is an amenable number.

210000209 is a deficient number, since it is larger than the sum of its proper divisors (3004303).

210000209 is an equidigital number, since it uses as much as digits as its factorization.

210000209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5727.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 210000209 is about 14491.3839573727. The cubic root of 210000209 is about 594.3923924635.

The spelling of 210000209 in words is "two hundred ten million, two hundred nine", and thus it is an aban number.