505000043 has 2 divisors, whose sum is σ = 505000044. Its totient is φ = 505000042.

The previous prime is 505000037. The next prime is 505000073. The reversal of 505000043 is 340000505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505000043 - 2¹² = 504995947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 504999985 and 505000030.

It is not a weakly prime, because it can be changed into another prime (505000003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252500021 + 252500022.

It is an arithmetic number, because the mean of its divisors is an integer number (252500022).

Almost surely, 2^505000043 is an apocalyptic number.

505000043 is a deficient number, since it is larger than the sum of its proper divisors (1).

505000043 is an equidigital number, since it uses as much as digits as its factorization.

505000043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 505000043 is about 22472.2060109817. The cubic root of 505000043 is about 796.3374467812.

Adding to 505000043 its reverse (340000505), we get a palindrome (845000548).

The spelling of 505000043 in words is "five hundred five million, forty-three", and thus it is an aban number.