503863813 has 2 divisors, whose sum is σ = 503863814. Its totient is φ = 503863812.

The previous prime is 503863769. The next prime is 503863823. The reversal of 503863813 is 318368305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484088004 + 19775809 = 22002^2 + 4447^2 .

It is a cyclic number.

It is not a de Polignac number, because 503863813 - 2¹³ = 503855621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503863823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251931906 + 251931907.

It is an arithmetic number, because the mean of its divisors is an integer number (251931907).

Almost surely, 2^503863813 is an apocalyptic number.

It is an amenable number.

503863813 is a deficient number, since it is larger than the sum of its proper divisors (1).

503863813 is an equidigital number, since it uses as much as digits as its factorization.

503863813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 503863813 is about 22446.9109901563. The cubic root of 503863813 is about 795.7397557750.

The spelling of 503863813 in words is "five hundred three million, eight hundred sixty-three thousand, eight hundred thirteen".