84218243 has 2 divisors, whose sum is σ = 84218244. Its totient is φ = 84218242.

The previous prime is 84218207. The next prime is 84218261. The reversal of 84218243 is 34281248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84218243 - 2¹² = 84214147 is a prime.

It is not a weakly prime, because it can be changed into another prime (84218273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42109121 + 42109122.

It is an arithmetic number, because the mean of its divisors is an integer number (42109122).

Almost surely, 2^84218243 is an apocalyptic number.

84218243 is a deficient number, since it is larger than the sum of its proper divisors (1).

84218243 is an equidigital number, since it uses as much as digits as its factorization.

84218243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 32.

The square root of 84218243 is about 9177.0497982740. The cubic root of 84218243 is about 438.3308714588.

The spelling of 84218243 in words is "eighty-four million, two hundred eighteen thousand, two hundred forty-three".