508090813 has 2 divisors, whose sum is σ = 508090814. Its totient is φ = 508090812.

The previous prime is 508090801. The next prime is 508090829. The reversal of 508090813 is 318090805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397882809 + 110208004 = 19947^2 + 10498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-508090813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (508090873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254045406 + 254045407.

It is an arithmetic number, because the mean of its divisors is an integer number (254045407).

Almost surely, 2^508090813 is an apocalyptic number.

It is an amenable number.

508090813 is a deficient number, since it is larger than the sum of its proper divisors (1).

508090813 is an equidigital number, since it uses as much as digits as its factorization.

508090813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 508090813 is about 22540.8698368098. The cubic root of 508090813 is about 797.9587612142.

The spelling of 508090813 in words is "five hundred eight million, ninety thousand, eight hundred thirteen".