209236193 has 2 divisors, whose sum is σ = 209236194. Its totient is φ = 209236192.

The previous prime is 209236171. The next prime is 209236201. The reversal of 209236193 is 391632902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189805729 + 19430464 = 13777^2 + 4408^2 .

It is a cyclic number.

It is not a de Polignac number, because 209236193 - 2⁸ = 209235937 is a prime.

It is a super-2 number, since 2×209236193² = 87559568922266498, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (209236123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104618096 + 104618097.

It is an arithmetic number, because the mean of its divisors is an integer number (104618097).

Almost surely, 2^209236193 is an apocalyptic number.

It is an amenable number.

209236193 is a deficient number, since it is larger than the sum of its proper divisors (1).

209236193 is an equidigital number, since it uses as much as digits as its factorization.

209236193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 209236193 is about 14464.9988938817. The cubic root of 209236193 is about 593.6706834326.

The spelling of 209236193 in words is "two hundred nine million, two hundred thirty-six thousand, one hundred ninety-three".