420030503 has 2 divisors, whose sum is σ = 420030504. Its totient is φ = 420030502.

The previous prime is 420030487. The next prime is 420030593. The reversal of 420030503 is 305030024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420030503 - 2⁴ = 420030487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420030593) 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, 210015251 + 210015252.

It is an arithmetic number, because the mean of its divisors is an integer number (210015252).

Almost surely, 2^420030503 is an apocalyptic number.

420030503 is a deficient number, since it is larger than the sum of its proper divisors (1).

420030503 is an equidigital number, since it uses as much as digits as its factorization.

420030503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 420030503 is about 20494.6457154058. The cubic root of 420030503 is about 748.9053678921.

Adding to 420030503 its reverse (305030024), we get a palindrome (725060527).

The spelling of 420030503 in words is "four hundred twenty million, thirty thousand, five hundred three".