420334543 has 2 divisors, whose sum is σ = 420334544. Its totient is φ = 420334542.

The previous prime is 420334529. The next prime is 420334547. The reversal of 420334543 is 345433024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420334543 - 2¹³ = 420326351 is a prime.

It is a super-2 number, since 2×420334543² = 353362256078037698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420334547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210167271 + 210167272.

It is an arithmetic number, because the mean of its divisors is an integer number (210167272).

Almost surely, 2^420334543 is an apocalyptic number.

420334543 is a deficient number, since it is larger than the sum of its proper divisors (1).

420334543 is an equidigital number, since it uses as much as digits as its factorization.

420334543 is an odious number, because the sum of its binary digits is odd.

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

The square root of 420334543 is about 20502.0619206947. The cubic root of 420334543 is about 749.0860232403.

Adding to 420334543 its reverse (345433024), we get a palindrome (765767567).

The spelling of 420334543 in words is "four hundred twenty million, three hundred thirty-four thousand, five hundred forty-three".