204040399 has 2 divisors, whose sum is σ = 204040400. Its totient is φ = 204040398.

The previous prime is 204040381. The next prime is 204040423. The reversal of 204040399 is 993040402.

204040399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204040399 - 2⁵ = 204040367 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204040399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204040379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102020199 + 102020200.

It is an arithmetic number, because the mean of its divisors is an integer number (102020200).

Almost surely, 2^204040399 is an apocalyptic number.

204040399 is a deficient number, since it is larger than the sum of its proper divisors (1).

204040399 is an equidigital number, since it uses as much as digits as its factorization.

204040399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 204040399 is about 14284.2710349531. The cubic root of 204040399 is about 588.7153885078.

The spelling of 204040399 in words is "two hundred four million, forty thousand, three hundred ninety-nine".