209530193 has 2 divisors, whose sum is σ = 209530194. Its totient is φ = 209530192.

The previous prime is 209530109. The next prime is 209530273. The reversal of 209530193 is 391035902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178035649 + 31494544 = 13343^2 + 5612^2 .

It is a cyclic number.

It is not a de Polignac number, because 209530193 - 2²⁰ = 208481617 is a prime.

It is not a weakly prime, because it can be changed into another prime (209530393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104765096 + 104765097.

It is an arithmetic number, because the mean of its divisors is an integer number (104765097).

Almost surely, 2^209530193 is an apocalyptic number.

It is an amenable number.

209530193 is a deficient number, since it is larger than the sum of its proper divisors (1).

209530193 is an equidigital number, since it uses as much as digits as its factorization.

209530193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 209530193 is about 14475.1577884319. The cubic root of 209530193 is about 593.9486109639.

The spelling of 209530193 in words is "two hundred nine million, five hundred thirty thousand, one hundred ninety-three".