503870740781 has 2 divisors, whose sum is σ = 503870740782. Its totient is φ = 503870740780.

The previous prime is 503870740759. The next prime is 503870740837. The reversal of 503870740781 is 187047078305.

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., 473666038756 + 30204702025 = 688234^2 + 173795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503870740781 is a prime.

It is a super-2 number, since 2×503870740781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503870740721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251935370390 + 251935370391.

It is an arithmetic number, because the mean of its divisors is an integer number (251935370391).

Almost surely, 2^503870740781 is an apocalyptic number.

It is an amenable number.

503870740781 is a deficient number, since it is larger than the sum of its proper divisors (1).

503870740781 is an equidigital number, since it uses as much as digits as its factorization.

503870740781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 503870740781 in words is "five hundred three billion, eight hundred seventy million, seven hundred forty thousand, seven hundred eighty-one".