84843217 has 2 divisors, whose sum is σ = 84843218. Its totient is φ = 84843216.

The previous prime is 84843203. The next prime is 84843223. The reversal of 84843217 is 71234848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61716736 + 23126481 = 7856^2 + 4809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84843217 is a prime.

It is not a weakly prime, because it can be changed into another prime (84843247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42421608 + 42421609.

It is an arithmetic number, because the mean of its divisors is an integer number (42421609).

Almost surely, 2^84843217 is an apocalyptic number.

It is an amenable number.

84843217 is a deficient number, since it is larger than the sum of its proper divisors (1).

84843217 is an equidigital number, since it uses as much as digits as its factorization.

84843217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 37.

The square root of 84843217 is about 9211.0377808366. The cubic root of 84843217 is about 439.4124682288.

The spelling of 84843217 in words is "eighty-four million, eight hundred forty-three thousand, two hundred seventeen".