503661317 has 2 divisors, whose sum is σ = 503661318. Its totient is φ = 503661316.

The previous prime is 503661313. The next prime is 503661331. The reversal of 503661317 is 713166305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407797636 + 95863681 = 20194^2 + 9791^2 .

It is a cyclic number.

It is not a de Polignac number, because 503661317 - 2² = 503661313 is a prime.

It is equal to p_26538242 and since 503661317 and 26538242 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503661313) 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, 251830658 + 251830659.

It is an arithmetic number, because the mean of its divisors is an integer number (251830659).

Almost surely, 2^503661317 is an apocalyptic number.

It is an amenable number.

503661317 is a deficient number, since it is larger than the sum of its proper divisors (1).

503661317 is an equidigital number, since it uses as much as digits as its factorization.

503661317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 503661317 is about 22442.3999830678. The cubic root of 503661317 is about 795.6331425036.

The spelling of 503661317 in words is "five hundred three million, six hundred sixty-one thousand, three hundred seventeen".