505878019 has 2 divisors, whose sum is σ = 505878020. Its totient is φ = 505878018.

The previous prime is 505878017. The next prime is 505878041. The reversal of 505878019 is 910878505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505878019 - 2¹ = 505878017 is a prime.

It is a super-2 number, since 2×505878019² = 511825140214728722, which contains 22 as substring.

Together with 505878017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (505878013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252939009 + 252939010.

It is an arithmetic number, because the mean of its divisors is an integer number (252939010).

Almost surely, 2^505878019 is an apocalyptic number.

505878019 is a deficient number, since it is larger than the sum of its proper divisors (1).

505878019 is an equidigital number, since it uses as much as digits as its factorization.

505878019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 505878019 is about 22491.7322365353. The cubic root of 505878019 is about 796.7986747126.

The spelling of 505878019 in words is "five hundred five million, eight hundred seventy-eight thousand, nineteen".