209201693 has 2 divisors, whose sum is σ = 209201694. Its totient is φ = 209201692.

The previous prime is 209201689. The next prime is 209201753. The reversal of 209201693 is 396102902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131285764 + 77915929 = 11458^2 + 8827^2 .

It is a cyclic number.

It is not a de Polignac number, because 209201693 - 2² = 209201689 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209201623) 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, 104600846 + 104600847.

It is an arithmetic number, because the mean of its divisors is an integer number (104600847).

Almost surely, 2^209201693 is an apocalyptic number.

It is an amenable number.

209201693 is a deficient number, since it is larger than the sum of its proper divisors (1).

209201693 is an equidigital number, since it uses as much as digits as its factorization.

209201693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 209201693 is about 14463.8063109266. The cubic root of 209201693 is about 593.6380524234.

The spelling of 209201693 in words is "two hundred nine million, two hundred one thousand, six hundred ninety-three".