212843843 has 2 divisors, whose sum is σ = 212843844. Its totient is φ = 212843842.

The previous prime is 212843831. The next prime is 212843867. The reversal of 212843843 is 348348212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212843843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212843243) 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, 106421921 + 106421922.

It is an arithmetic number, because the mean of its divisors is an integer number (106421922).

Almost surely, 2^212843843 is an apocalyptic number.

212843843 is a deficient number, since it is larger than the sum of its proper divisors (1).

212843843 is an equidigital number, since it uses as much as digits as its factorization.

212843843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 35.

The square root of 212843843 is about 14589.1686877629. The cubic root of 212843843 is about 597.0632820042.

The spelling of 212843843 in words is "two hundred twelve million, eight hundred forty-three thousand, eight hundred forty-three".