404420503 has 2 divisors, whose sum is σ = 404420504. Its totient is φ = 404420502.

The previous prime is 404420381. The next prime is 404420521. The reversal of 404420503 is 305024404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404420503 - 2⁹ = 404419991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404420563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202210251 + 202210252.

It is an arithmetic number, because the mean of its divisors is an integer number (202210252).

Almost surely, 2^404420503 is an apocalyptic number.

404420503 is a deficient number, since it is larger than the sum of its proper divisors (1).

404420503 is an equidigital number, since it uses as much as digits as its factorization.

404420503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 404420503 is about 20110.2089248222. The cubic root of 404420503 is about 739.5105742292.

Adding to 404420503 its reverse (305024404), we get a palindrome (709444907).

The spelling of 404420503 in words is "four hundred four million, four hundred twenty thousand, five hundred three".