505321417 has 2 divisors, whose sum is σ = 505321418. Its totient is φ = 505321416.

The previous prime is 505321387. The next prime is 505321429. The reversal of 505321417 is 714123505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495107001 + 10214416 = 22251^2 + 3196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505321417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (505321217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252660708 + 252660709.

It is an arithmetic number, because the mean of its divisors is an integer number (252660709).

Almost surely, 2^505321417 is an apocalyptic number.

It is an amenable number.

505321417 is a deficient number, since it is larger than the sum of its proper divisors (1).

505321417 is an equidigital number, since it uses as much as digits as its factorization.

505321417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 505321417 is about 22479.3553510771. The cubic root of 505321417 is about 796.5063364576.

The spelling of 505321417 in words is "five hundred five million, three hundred twenty-one thousand, four hundred seventeen".