204012397 has 2 divisors, whose sum is σ = 204012398. Its totient is φ = 204012396.

The previous prime is 204012379. The next prime is 204012407. The reversal of 204012397 is 793210402.

Together with previous prime (204012379) 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., 195608196 + 8404201 = 13986^2 + 2899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204012397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204012307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102006198 + 102006199.

It is an arithmetic number, because the mean of its divisors is an integer number (102006199).

Almost surely, 2^204012397 is an apocalyptic number.

It is an amenable number.

204012397 is a deficient number, since it is larger than the sum of its proper divisors (1).

204012397 is an equidigital number, since it uses as much as digits as its factorization.

204012397 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 28.

The square root of 204012397 is about 14283.2908322977. The cubic root of 204012397 is about 588.6884559941.

Adding to 204012397 its reverse (793210402), we get a palindrome (997222799).

The spelling of 204012397 in words is "two hundred four million, twelve thousand, three hundred ninety-seven".