420216943 has 2 divisors, whose sum is σ = 420216944. Its totient is φ = 420216942.

The previous prime is 420216917. The next prime is 420216967. The reversal of 420216943 is 349612024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420216943 - 2⁹ = 420216431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420216743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210108471 + 210108472.

It is an arithmetic number, because the mean of its divisors is an integer number (210108472).

Almost surely, 2^420216943 is an apocalyptic number.

420216943 is a deficient number, since it is larger than the sum of its proper divisors (1).

420216943 is an equidigital number, since it uses as much as digits as its factorization.

420216943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 420216943 is about 20499.1937158514. The cubic root of 420216943 is about 749.0161576737.

Adding to 420216943 its reverse (349612024), we get a palindrome (769828967).

The spelling of 420216943 in words is "four hundred twenty million, two hundred sixteen thousand, nine hundred forty-three".