420330403 has 2 divisors, whose sum is σ = 420330404. Its totient is φ = 420330402.

The previous prime is 420330377. The next prime is 420330409. The reversal of 420330403 is 304033024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420330403 - 2⁵ = 420330371 is a prime.

It is a super-2 number, since 2×420330403² = 353355295372284818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420330409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210165201 + 210165202.

It is an arithmetic number, because the mean of its divisors is an integer number (210165202).

Almost surely, 2^420330403 is an apocalyptic number.

420330403 is a deficient number, since it is larger than the sum of its proper divisors (1).

420330403 is an equidigital number, since it uses as much as digits as its factorization.

420330403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 420330403 is about 20501.9609549916. The cubic root of 420330403 is about 749.0835639085.

Adding to 420330403 its reverse (304033024), we get a palindrome (724363427).

The spelling of 420330403 in words is "four hundred twenty million, three hundred thirty thousand, four hundred three".