503998213 has 2 divisors, whose sum is σ = 503998214. Its totient is φ = 503998212.

The previous prime is 503998169. The next prime is 503998247. The reversal of 503998213 is 312899305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 489382884 + 14615329 = 22122^2 + 3823^2 .

It is a cyclic number.

It is not a de Polignac number, because 503998213 - 2⁹ = 503997701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503998273) 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, 251999106 + 251999107.

It is an arithmetic number, because the mean of its divisors is an integer number (251999107).

Almost surely, 2^503998213 is an apocalyptic number.

It is an amenable number.

503998213 is a deficient number, since it is larger than the sum of its proper divisors (1).

503998213 is an equidigital number, since it uses as much as digits as its factorization.

503998213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 503998213 is about 22449.9045209551. The cubic root of 503998213 is about 795.8105010259.

The spelling of 503998213 in words is "five hundred three million, nine hundred ninety-eight thousand, two hundred thirteen".