204123197 has 2 divisors, whose sum is σ = 204123198. Its totient is φ = 204123196.

The previous prime is 204123173. The next prime is 204123203. The reversal of 204123197 is 791321402.

204123197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202179961 + 1943236 = 14219^2 + 1394^2 .

It is a cyclic number.

It is not a de Polignac number, because 204123197 - 2¹⁴ = 204106813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204123797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102061598 + 102061599.

It is an arithmetic number, because the mean of its divisors is an integer number (102061599).

Almost surely, 2^204123197 is an apocalyptic number.

It is an amenable number.

204123197 is a deficient number, since it is larger than the sum of its proper divisors (1).

204123197 is an equidigital number, since it uses as much as digits as its factorization.

204123197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 204123197 is about 14287.1689637941. The cubic root of 204123197 is about 588.7950097741.

Adding to 204123197 its reverse (791321402), we get a palindrome (995444599).

The spelling of 204123197 in words is "two hundred four million, one hundred twenty-three thousand, one hundred ninety-seven".