204210197 has 2 divisors, whose sum is σ = 204210198. Its totient is φ = 204210196.

The previous prime is 204210179. The next prime is 204210203. The reversal of 204210197 is 791012402.

Together with previous prime (204210179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203889841 + 320356 = 14279^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 204210197 - 2¹⁴ = 204193813 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 (204216197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102105098 + 102105099.

It is an arithmetic number, because the mean of its divisors is an integer number (102105099).

Almost surely, 2^204210197 is an apocalyptic number.

It is an amenable number.

204210197 is a deficient number, since it is larger than the sum of its proper divisors (1).

204210197 is an equidigital number, since it uses as much as digits as its factorization.

204210197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 204210197 is about 14290.2133294083. The cubic root of 204210197 is about 588.8786486267.

Adding to 204210197 its reverse (791012402), we get a palindrome (995222599).

The spelling of 204210197 in words is "two hundred four million, two hundred ten thousand, one hundred ninety-seven".