505903019 has 2 divisors, whose sum is σ = 505903020. Its totient is φ = 505903018.

The previous prime is 505903003. The next prime is 505903031. The reversal of 505903019 is 910309505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505903019 - 2⁴ = 505903003 is a prime.

It is a super-2 number, since 2×505903019² = 511875729266628722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505903039) 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, 252951509 + 252951510.

It is an arithmetic number, because the mean of its divisors is an integer number (252951510).

Almost surely, 2^505903019 is an apocalyptic number.

505903019 is a deficient number, since it is larger than the sum of its proper divisors (1).

505903019 is an equidigital number, since it uses as much as digits as its factorization.

505903019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 505903019 is about 22492.2879894421. The cubic root of 505903019 is about 796.8118001684.

The spelling of 505903019 in words is "five hundred five million, nine hundred three thousand, nineteen".