504643493 has 2 divisors, whose sum is σ = 504643494. Its totient is φ = 504643492.

The previous prime is 504643441. The next prime is 504643507. The reversal of 504643493 is 394346405.

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., 337897924 + 166745569 = 18382^2 + 12913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-504643493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504643093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252321746 + 252321747.

It is an arithmetic number, because the mean of its divisors is an integer number (252321747).

Almost surely, 2^504643493 is an apocalyptic number.

It is an amenable number.

504643493 is a deficient number, since it is larger than the sum of its proper divisors (1).

504643493 is an equidigital number, since it uses as much as digits as its factorization.

504643493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 504643493 is about 22464.2714771701. The cubic root of 504643493 is about 796.1499874139.

Adding to 504643493 its reverse (394346405), we get a palindrome (898989898).

The spelling of 504643493 in words is "five hundred four million, six hundred forty-three thousand, four hundred ninety-three".