505369 has 2 divisors, whose sum is σ = 505370. Its totient is φ = 505368.

The previous prime is 505367. The next prime is 505399. The reversal of 505369 is 963505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375769 + 129600 = 613^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 505369 - 2¹ = 505367 is a prime.

It is a super-2 number, since 2×505369² = 510795652322, which contains 22 as substring.

Together with 505367, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (505367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252684 + 252685.

It is an arithmetic number, because the mean of its divisors is an integer number (252685).

2⁵⁰⁵³⁶⁹ is an apocalyptic number.

It is an amenable number.

505369 is a deficient number, since it is larger than the sum of its proper divisors (1).

505369 is an equidigital number, since it uses as much as digits as its factorization.

505369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 505369 is about 710.8931002619. The cubic root of 505369 is about 79.6531336369.

The spelling of 505369 in words is "five hundred five thousand, three hundred sixty-nine".