503404313 has 2 divisors, whose sum is σ = 503404314. Its totient is φ = 503404312.

The previous prime is 503404309. The next prime is 503404331. The reversal of 503404313 is 313404305.

Together with next prime (503404331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 496264729 + 7139584 = 22277^2 + 2672^2 .

It is a cyclic number.

It is not a de Polignac number, because 503404313 - 2² = 503404309 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (503404303) 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, 251702156 + 251702157.

It is an arithmetic number, because the mean of its divisors is an integer number (251702157).

Almost surely, 2^503404313 is an apocalyptic number.

It is an amenable number.

503404313 is a deficient number, since it is larger than the sum of its proper divisors (1).

503404313 is an equidigital number, since it uses as much as digits as its factorization.

503404313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 503404313 is about 22436.6733942445. The cubic root of 503404313 is about 795.4977898481.

Adding to 503404313 its reverse (313404305), we get a palindrome (816808618).

The spelling of 503404313 in words is "five hundred three million, four hundred four thousand, three hundred thirteen".