423909503 has 2 divisors, whose sum is σ = 423909504. Its totient is φ = 423909502.

The previous prime is 423909463. The next prime is 423909533. The reversal of 423909503 is 305909324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423909503 - 2¹⁰ = 423908479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423909533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211954751 + 211954752.

It is an arithmetic number, because the mean of its divisors is an integer number (211954752).

Almost surely, 2^423909503 is an apocalyptic number.

423909503 is a deficient number, since it is larger than the sum of its proper divisors (1).

423909503 is an equidigital number, since it uses as much as digits as its factorization.

423909503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 423909503 is about 20589.0627032898. The cubic root of 423909503 is about 751.2036985204.

The spelling of 423909503 in words is "four hundred twenty-three million, nine hundred nine thousand, five hundred three".