420768443 has 4 divisors (see below), whose sum is σ = 425106360. Its totient is φ = 416430528.

The previous prime is 420768437. The next prime is 420768473. The reversal of 420768443 is 344867024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420768443 - 2¹² = 420764347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420768397 and 420768406.

It is not an unprimeable number, because it can be changed into a prime (420768473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2168813 + ... + 2169006.

It is an arithmetic number, because the mean of its divisors is an integer number (106276590).

Almost surely, 2^420768443 is an apocalyptic number.

420768443 is a deficient number, since it is larger than the sum of its proper divisors (4337917).

420768443 is an equidigital number, since it uses as much as digits as its factorization.

420768443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4337916.

The product of its (nonzero) digits is 129024, while the sum is 38.

The square root of 420768443 is about 20512.6410537502. The cubic root of 420768443 is about 749.3436883594.

The spelling of 420768443 in words is "four hundred twenty million, seven hundred sixty-eight thousand, four hundred forty-three".