209107193 has 2 divisors, whose sum is σ = 209107194. Its totient is φ = 209107192.

The previous prime is 209107187. The next prime is 209107243. The reversal of 209107193 is 391701902.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208600249 + 506944 = 14443^2 + 712^2 .

It is a cyclic number.

It is not a de Polignac number, because 209107193 - 2¹⁴ = 209090809 is a prime.

It is equal to p_11554844 and since 209107193 and 11554844 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (209107133) 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 as a sum of consecutive naturals, namely, 104553596 + 104553597.

It is an arithmetic number, because the mean of its divisors is an integer number (104553597).

Almost surely, 2^209107193 is an apocalyptic number.

It is an amenable number.

209107193 is a deficient number, since it is larger than the sum of its proper divisors (1).

209107193 is an equidigital number, since it uses as much as digits as its factorization.

209107193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 209107193 is about 14460.5391669882. The cubic root of 209107193 is about 593.5486534576.

The spelling of 209107193 in words is "two hundred nine million, one hundred seven thousand, one hundred ninety-three".