504366781 has 2 divisors, whose sum is σ = 504366782. Its totient is φ = 504366780.

The previous prime is 504366769. The next prime is 504366833. The reversal of 504366781 is 187663405.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438902500 + 65464281 = 20950^2 + 8091^2 .

It is a cyclic number.

It is not a de Polignac number, because 504366781 - 2²⁷ = 370149053 is a prime.

It is a super-2 number, since 2×504366781² = 508771699552603922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504366481) 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, 252183390 + 252183391.

It is an arithmetic number, because the mean of its divisors is an integer number (252183391).

Almost surely, 2^504366781 is an apocalyptic number.

It is an amenable number.

504366781 is a deficient number, since it is larger than the sum of its proper divisors (1).

504366781 is an equidigital number, since it uses as much as digits as its factorization.

504366781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 504366781 is about 22458.1116971129. Note that the first 3 decimals coincide. The cubic root of 504366781 is about 796.0044427292.

It can be divided in two parts, 5043 and 66781, that added together give a square (71824 = 268²).

The spelling of 504366781 in words is "five hundred four million, three hundred sixty-six thousand, seven hundred eighty-one".