503420173 has 2 divisors, whose sum is σ = 503420174. Its totient is φ = 503420172.

The previous prime is 503420161. The next prime is 503420189. The reversal of 503420173 is 371024305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302829604 + 200590569 = 17402^2 + 14163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503420173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509420173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251710086 + 251710087.

It is an arithmetic number, because the mean of its divisors is an integer number (251710087).

Almost surely, 2^503420173 is an apocalyptic number.

It is an amenable number.

503420173 is a deficient number, since it is larger than the sum of its proper divisors (1).

503420173 is an equidigital number, since it uses as much as digits as its factorization.

503420173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 503420173 is about 22437.0268306654. The cubic root of 503420173 is about 795.5061439431.

Adding to 503420173 its reverse (371024305), we get a palindrome (874444478).

The spelling of 503420173 in words is "five hundred three million, four hundred twenty thousand, one hundred seventy-three".