508463981 has 2 divisors, whose sum is σ = 508463982. Its totient is φ = 508463980.

The previous prime is 508463951. The next prime is 508464037. The reversal of 508463981 is 189364805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 503329225 + 5134756 = 22435^2 + 2266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-508463981 is a prime.

It is a super-2 number, since 2×508463981² = 517071239948736722, 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 (508463911) 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, 254231990 + 254231991.

It is an arithmetic number, because the mean of its divisors is an integer number (254231991).

Almost surely, 2^508463981 is an apocalyptic number.

It is an amenable number.

508463981 is a deficient number, since it is larger than the sum of its proper divisors (1).

508463981 is an equidigital number, since it uses as much as digits as its factorization.

508463981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 508463981 is about 22549.1459040027. The cubic root of 508463981 is about 798.1540673795.

The spelling of 508463981 in words is "five hundred eight million, four hundred sixty-three thousand, nine hundred eighty-one".