420440003 has 2 divisors, whose sum is σ = 420440004. Its totient is φ = 420440002.

The previous prime is 420439979. The next prime is 420440047. The reversal of 420440003 is 300044024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420440003 is a prime.

It is a super-2 number, since 2×420440003² = 353539592245280018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420443003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210220001 + 210220002.

It is an arithmetic number, because the mean of its divisors is an integer number (210220002).

Almost surely, 2^420440003 is an apocalyptic number.

420440003 is a deficient number, since it is larger than the sum of its proper divisors (1).

420440003 is an equidigital number, since it uses as much as digits as its factorization.

420440003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 420440003 is about 20504.6336958259. The cubic root of 420440003 is about 749.1486654123.

Adding to 420440003 its reverse (300044024), we get a palindrome (720484027).

The spelling of 420440003 in words is "four hundred twenty million, four hundred forty thousand, three".