504748781 has 2 divisors, whose sum is σ = 504748782. Its totient is φ = 504748780.

The previous prime is 504748763. The next prime is 504748817. The reversal of 504748781 is 187847405.

Together with next prime (504748817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401401225 + 103347556 = 20035^2 + 10166^2 .

It is a cyclic number.

It is not a de Polignac number, because 504748781 - 2¹⁰ = 504747757 is a prime.

It is a super-2 number, since 2×504748781² = 509542663841971922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504748711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252374390 + 252374391.

It is an arithmetic number, because the mean of its divisors is an integer number (252374391).

Almost surely, 2^504748781 is an apocalyptic number.

It is an amenable number.

504748781 is a deficient number, since it is larger than the sum of its proper divisors (1).

504748781 is an equidigital number, since it uses as much as digits as its factorization.

504748781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250880, while the sum is 44.

The square root of 504748781 is about 22466.6148095346. The cubic root of 504748781 is about 796.2053527110.

The spelling of 504748781 in words is "five hundred four million, seven hundred forty-eight thousand, seven hundred eighty-one".