508806121 has 2 divisors, whose sum is σ = 508806122. Its totient is φ = 508806120.

The previous prime is 508806119. The next prime is 508806163. The reversal of 508806121 is 121608805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267780496 + 241025625 = 16364^2 + 15525^2 .

It is a cyclic number.

It is not a de Polignac number, because 508806121 - 2¹ = 508806119 is a prime.

Together with 508806119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (508806191) 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, 254403060 + 254403061.

It is an arithmetic number, because the mean of its divisors is an integer number (254403061).

Almost surely, 2^508806121 is an apocalyptic number.

It is an amenable number.

508806121 is a deficient number, since it is larger than the sum of its proper divisors (1).

508806121 is an equidigital number, since it uses as much as digits as its factorization.

508806121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 508806121 is about 22556.7311683231. The cubic root of 508806121 is about 798.3330503653. Note that the first 3 decimals are identical.

The spelling of 508806121 in words is "five hundred eight million, eight hundred six thousand, one hundred twenty-one".