505004243 has 2 divisors, whose sum is σ = 505004244. Its totient is φ = 505004242.

The previous prime is 505004233. The next prime is 505004323. The reversal of 505004243 is 342400505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505004243 - 2¹⁴ = 504987859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (505004233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252502121 + 252502122.

It is an arithmetic number, because the mean of its divisors is an integer number (252502122).

Almost surely, 2^505004243 is an apocalyptic number.

505004243 is a deficient number, since it is larger than the sum of its proper divisors (1).

505004243 is an equidigital number, since it uses as much as digits as its factorization.

505004243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 505004243 is about 22472.2994595569. The cubic root of 505004243 is about 796.3396544431.

Adding to 505004243 its reverse (342400505), we get a palindrome (847404748).

The spelling of 505004243 in words is "five hundred five million, four thousand, two hundred forty-three".