503305073 has 2 divisors, whose sum is σ = 503305074. Its totient is φ = 503305072.

The previous prime is 503305039. The next prime is 503305091. The reversal of 503305073 is 370503305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498539584 + 4765489 = 22328^2 + 2183^2 .

It is a cyclic number.

It is not a de Polignac number, because 503305073 - 2⁸ = 503304817 is a prime.

It is not a weakly prime, because it can be changed into another prime (503305373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251652536 + 251652537.

It is an arithmetic number, because the mean of its divisors is an integer number (251652537).

Almost surely, 2^503305073 is an apocalyptic number.

It is an amenable number.

503305073 is a deficient number, since it is larger than the sum of its proper divisors (1).

503305073 is an equidigital number, since it uses as much as digits as its factorization.

503305073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725, while the sum is 26.

The square root of 503305073 is about 22434.4617274407. The cubic root of 503305073 is about 795.4455121945.

Adding to 503305073 its reverse (370503305), we get a palindrome (873808378).

The spelling of 503305073 in words is "five hundred three million, three hundred five thousand, seventy-three".