209108201 has 4 divisors (see below), whose sum is σ = 214759812. Its totient is φ = 203456592.

The previous prime is 209108197. The next prime is 209108209. The reversal of 209108201 is 102801902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202322176 + 6786025 = 14224^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 209108201 - 2² = 209108197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209108209) 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 3 ways as a sum of consecutive naturals, for example, 2825750 + ... + 2825823.

It is an arithmetic number, because the mean of its divisors is an integer number (53689953).

Almost surely, 2^209108201 is an apocalyptic number.

It is an amenable number.

209108201 is a deficient number, since it is larger than the sum of its proper divisors (5651611).

209108201 is an equidigital number, since it uses as much as digits as its factorization.

209108201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5651610.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 209108201 is about 14460.5740204184. The cubic root of 209108201 is about 593.5496071887.

The spelling of 209108201 in words is "two hundred nine million, one hundred eight thousand, two hundred one".