505744469 has 2 divisors, whose sum is σ = 505744470. Its totient is φ = 505744468.

The previous prime is 505744429. The next prime is 505744483. The reversal of 505744469 is 964447505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307300900 + 198443569 = 17530^2 + 14087^2 .

It is a cyclic number.

It is not a de Polignac number, because 505744469 - 2¹² = 505740373 is a prime.

It is a super-2 number, since 2×505744469² = 511554935848183922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505744409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252872234 + 252872235.

It is an arithmetic number, because the mean of its divisors is an integer number (252872235).

Almost surely, 2^505744469 is an apocalyptic number.

It is an amenable number.

505744469 is a deficient number, since it is larger than the sum of its proper divisors (1).

505744469 is an equidigital number, since it uses as much as digits as its factorization.

505744469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 44.

The square root of 505744469 is about 22488.7631718599. The cubic root of 505744469 is about 796.7285512015.

The spelling of 505744469 in words is "five hundred five million, seven hundred forty-four thousand, four hundred sixty-nine".