504660781 has 2 divisors, whose sum is σ = 504660782. Its totient is φ = 504660780.

The previous prime is 504660731. The next prime is 504660823. The reversal of 504660781 is 187066405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406828900 + 97831881 = 20170^2 + 9891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-504660781 is a prime.

It is a super-2 number, since 2×504660781² = 509365007759059922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 504660781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504660701) 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, 252330390 + 252330391.

It is an arithmetic number, because the mean of its divisors is an integer number (252330391).

Almost surely, 2^504660781 is an apocalyptic number.

It is an amenable number.

504660781 is a deficient number, since it is larger than the sum of its proper divisors (1).

504660781 is an equidigital number, since it uses as much as digits as its factorization.

504660781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 504660781 is about 22464.6562626718. The cubic root of 504660781 is about 796.1590787717.

The spelling of 504660781 in words is "five hundred four million, six hundred sixty thousand, seven hundred eighty-one".