505345549 has 2 divisors, whose sum is σ = 505345550. Its totient is φ = 505345548.

The previous prime is 505345523. The next prime is 505345559. The reversal of 505345549 is 945543505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261048649 + 244296900 = 16157^2 + 15630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505345549 is a prime.

It is a super-2 number, since 2×505345549² = 510748247788222802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505345559) 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, 252672774 + 252672775.

It is an arithmetic number, because the mean of its divisors is an integer number (252672775).

Almost surely, 2^505345549 is an apocalyptic number.

It is an amenable number.

505345549 is a deficient number, since it is larger than the sum of its proper divisors (1).

505345549 is an equidigital number, since it uses as much as digits as its factorization.

505345549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270000, while the sum is 40.

The square root of 505345549 is about 22479.8921038336. The cubic root of 505345549 is about 796.5190155066.

It can be divided in two parts, 5053455 and 49, that added together give a square (5053504 = 2248²).

The spelling of 505345549 in words is "five hundred five million, three hundred forty-five thousand, five hundred forty-nine".