209626201 has 8 divisors (see below), whose sum is σ = 227956680. Its totient is φ = 191962368.

The previous prime is 209626199. The next prime is 209626213. The reversal of 209626201 is 102626902.

It can be written as a sum of positive squares in 4 ways, for example, as 65626201 + 144000000 = 8101^2 + 12000^2 .

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

It is not a de Polignac number, because 209626201 - 2¹ = 209626199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 209626201.

It is not an unprimeable number, because it can be changed into a prime (209626231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166006 + ... + 167263.

It is an arithmetic number, because the mean of its divisors is an integer number (28494585).

Almost surely, 2^209626201 is an apocalyptic number.

It is an amenable number.

209626201 is a deficient number, since it is larger than the sum of its proper divisors (18330479).

209626201 is a wasteful number, since it uses less digits than its factorization.

209626201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333323.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 209626201 is about 14478.4737109959. The cubic root of 209626201 is about 594.0393140587.

The spelling of 209626201 in words is "two hundred nine million, six hundred twenty-six thousand, two hundred one".