420420443 has 2 divisors, whose sum is σ = 420420444. Its totient is φ = 420420442.

The previous prime is 420420439. The next prime is 420420449. The reversal of 420420443 is 344024024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420420443 - 2² = 420420439 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420420449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210210221 + 210210222.

It is an arithmetic number, because the mean of its divisors is an integer number (210210222).

Almost surely, 2^420420443 is an apocalyptic number.

420420443 is a deficient number, since it is larger than the sum of its proper divisors (1).

420420443 is an equidigital number, since it uses as much as digits as its factorization.

420420443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 420420443 is about 20504.1567249180. The cubic root of 420420443 is about 749.1370477617.

Adding to 420420443 its reverse (344024024), we get a palindrome (764444467).

The spelling of 420420443 in words is "four hundred twenty million, four hundred twenty thousand, four hundred forty-three".