421000343 has 2 divisors, whose sum is σ = 421000344. Its totient is φ = 421000342.

The previous prime is 421000339. The next prime is 421000379. The reversal of 421000343 is 343000124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421000343 - 2² = 421000339 is a prime.

It is a super-2 number, since 2×421000343² = 354482577612235298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421000313) 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, 210500171 + 210500172.

It is an arithmetic number, because the mean of its divisors is an integer number (210500172).

Almost surely, 2^421000343 is an apocalyptic number.

421000343 is a deficient number, since it is larger than the sum of its proper divisors (1).

421000343 is an equidigital number, since it uses as much as digits as its factorization.

421000343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 421000343 is about 20518.2928870801. The cubic root of 421000343 is about 749.4813261266.

Adding to 421000343 its reverse (343000124), we get a palindrome (764000467).

The spelling of 421000343 in words is "four hundred twenty-one million, three hundred forty-three", and thus it is an aban number.