84214217 has 2 divisors, whose sum is σ = 84214218. Its totient is φ = 84214216.

The previous prime is 84214171. The next prime is 84214219. The reversal of 84214217 is 71241248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83375161 + 839056 = 9131^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 84214217 - 2⁶ = 84214153 is a prime.

Together with 84214219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84214217.

It is not a weakly prime, because it can be changed into another prime (84214219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42107108 + 42107109.

It is an arithmetic number, because the mean of its divisors is an integer number (42107109).

Almost surely, 2^84214217 is an apocalyptic number.

It is an amenable number.

84214217 is a deficient number, since it is larger than the sum of its proper divisors (1).

84214217 is an equidigital number, since it uses as much as digits as its factorization.

84214217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 29.

The square root of 84214217 is about 9176.8304441130. The cubic root of 84214217 is about 438.3238866372.

The spelling of 84214217 in words is "eighty-four million, two hundred fourteen thousand, two hundred seventeen".