505494089 has 2 divisors, whose sum is σ = 505494090. Its totient is φ = 505494088.

The previous prime is 505494053. The next prime is 505494097. The reversal of 505494089 is 980494505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388681225 + 116812864 = 19715^2 + 10808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505494089 is a prime.

It is not a weakly prime, because it can be changed into another prime (505494049) 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, 252747044 + 252747045.

It is an arithmetic number, because the mean of its divisors is an integer number (252747045).

Almost surely, 2^505494089 is an apocalyptic number.

It is an amenable number.

505494089 is a deficient number, since it is larger than the sum of its proper divisors (1).

505494089 is an equidigital number, since it uses as much as digits as its factorization.

505494089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 505494089 is about 22483.1957025686. The cubic root of 505494089 is about 796.5970501269.

The spelling of 505494089 in words is "five hundred five million, four hundred ninety-four thousand, eighty-nine".