505605497 has 2 divisors, whose sum is σ = 505605498. Its totient is φ = 505605496.

The previous prime is 505605491. The next prime is 505605511. The reversal of 505605497 is 794506505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 473671696 + 31933801 = 21764^2 + 5651^2 .

It is a cyclic number.

It is not a de Polignac number, because 505605497 - 2⁶ = 505605433 is a prime.

It is not a weakly prime, because it can be changed into another prime (505605491) 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, 252802748 + 252802749.

It is an arithmetic number, because the mean of its divisors is an integer number (252802749).

Almost surely, 2^505605497 is an apocalyptic number.

It is an amenable number.

505605497 is a deficient number, since it is larger than the sum of its proper divisors (1).

505605497 is an equidigital number, since it uses as much as digits as its factorization.

505605497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 505605497 is about 22485.6731498081. The cubic root of 505605497 is about 796.6555676362.

The spelling of 505605497 in words is "five hundred five million, six hundred five thousand, four hundred ninety-seven".