420743443 has 2 divisors, whose sum is σ = 420743444. Its totient is φ = 420743442.

The previous prime is 420743437. The next prime is 420743447. The reversal of 420743443 is 344347024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420743443 is a prime.

It is not a weakly prime, because it can be changed into another prime (420743447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210371721 + 210371722.

It is an arithmetic number, because the mean of its divisors is an integer number (210371722).

Almost surely, 2^420743443 is an apocalyptic number.

420743443 is a deficient number, since it is larger than the sum of its proper divisors (1).

420743443 is an equidigital number, since it uses as much as digits as its factorization.

420743443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 31.

The square root of 420743443 is about 20512.0316643671. The cubic root of 420743443 is about 749.3288472882.

The spelling of 420743443 in words is "four hundred twenty million, seven hundred forty-three thousand, four hundred forty-three".