209429201 has 2 divisors, whose sum is σ = 209429202. Its totient is φ = 209429200.

The previous prime is 209429183. The next prime is 209429243. The reversal of 209429201 is 102924902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158734801 + 50694400 = 12599^2 + 7120^2 .

It is a cyclic number.

It is not a de Polignac number, because 209429201 - 2²⁶ = 142320337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (209429401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104714600 + 104714601.

It is an arithmetic number, because the mean of its divisors is an integer number (104714601).

Almost surely, 2^209429201 is an apocalyptic number.

It is an amenable number.

209429201 is a deficient number, since it is larger than the sum of its proper divisors (1).

209429201 is an equidigital number, since it uses as much as digits as its factorization.

209429201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 209429201 is about 14471.6689085952. The cubic root of 209429201 is about 593.8531693521.

The spelling of 209429201 in words is "two hundred nine million, four hundred twenty-nine thousand, two hundred one".