420435343 has 2 divisors, whose sum is σ = 420435344. Its totient is φ = 420435342.

The previous prime is 420435319. The next prime is 420435349. The reversal of 420435343 is 343534024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420435343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420435349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210217671 + 210217672.

It is an arithmetic number, because the mean of its divisors is an integer number (210217672).

Almost surely, 2^420435343 is an apocalyptic number.

420435343 is a deficient number, since it is larger than the sum of its proper divisors (1).

420435343 is an equidigital number, since it uses as much as digits as its factorization.

420435343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 28.

The square root of 420435343 is about 20504.5200626594. The cubic root of 420435343 is about 749.1458976407.

Adding to 420435343 its reverse (343534024), we get a palindrome (763969367).

The spelling of 420435343 in words is "four hundred twenty million, four hundred thirty-five thousand, three hundred forty-three".