505438207 has 2 divisors, whose sum is σ = 505438208. Its totient is φ = 505438206.

The previous prime is 505438189. The next prime is 505438231. The reversal of 505438207 is 702834505.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505438207 - 2¹⁹ = 504913919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505438267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252719103 + 252719104.

It is an arithmetic number, because the mean of its divisors is an integer number (252719104).

Almost surely, 2^505438207 is an apocalyptic number.

505438207 is a deficient number, since it is larger than the sum of its proper divisors (1).

505438207 is an equidigital number, since it uses as much as digits as its factorization.

505438207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 505438207 is about 22481.9529178406. The cubic root of 505438207 is about 796.5676946390.

The spelling of 505438207 in words is "five hundred five million, four hundred thirty-eight thousand, two hundred seven".