508391161 has 2 divisors, whose sum is σ = 508391162. Its totient is φ = 508391160.

The previous prime is 508391089. The next prime is 508391173. The reversal of 508391161 is 161193805.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383376400 + 125014761 = 19580^2 + 11181^2 .

It is a cyclic number.

It is not a de Polignac number, because 508391161 - 2¹¹ = 508389113 is a prime.

It is not a weakly prime, because it can be changed into another prime (508391461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254195580 + 254195581.

It is an arithmetic number, because the mean of its divisors is an integer number (254195581).

Almost surely, 2^508391161 is an apocalyptic number.

It is an amenable number.

508391161 is a deficient number, since it is larger than the sum of its proper divisors (1).

508391161 is an equidigital number, since it uses as much as digits as its factorization.

508391161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 508391161 is about 22547.5311508821. The cubic root of 508391161 is about 798.1159628423.

The spelling of 508391161 in words is "five hundred eight million, three hundred ninety-one thousand, one hundred sixty-one".