204312497 has 2 divisors, whose sum is σ = 204312498. Its totient is φ = 204312496.

The previous prime is 204312487. The next prime is 204312527. The reversal of 204312497 is 794213402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204032656 + 279841 = 14284^2 + 529^2 .

It is a cyclic number.

It is not a de Polignac number, because 204312497 - 2¹⁶ = 204246961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204312487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102156248 + 102156249.

It is an arithmetic number, because the mean of its divisors is an integer number (102156249).

Almost surely, 2^204312497 is an apocalyptic number.

It is an amenable number.

204312497 is a deficient number, since it is larger than the sum of its proper divisors (1).

204312497 is an equidigital number, since it uses as much as digits as its factorization.

204312497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 204312497 is about 14293.7922539821. The cubic root of 204312497 is about 588.9769659975.

Adding to 204312497 its reverse (794213402), we get a palindrome (998525899).

The spelling of 204312497 in words is "two hundred four million, three hundred twelve thousand, four hundred ninety-seven".