84198217 has 2 divisors, whose sum is σ = 84198218. Its totient is φ = 84198216.

The previous prime is 84198211. The next prime is 84198259. The reversal of 84198217 is 71289148.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47183161 + 37015056 = 6869^2 + 6084^2 .

It is a cyclic number.

It is not a de Polignac number, because 84198217 - 2³ = 84198209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84198217.

It is not a weakly prime, because it can be changed into another prime (84198211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42099108 + 42099109.

It is an arithmetic number, because the mean of its divisors is an integer number (42099109).

Almost surely, 2^84198217 is an apocalyptic number.

It is an amenable number.

84198217 is a deficient number, since it is larger than the sum of its proper divisors (1).

84198217 is an equidigital number, since it uses as much as digits as its factorization.

84198217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 40.

The square root of 84198217 is about 9175.9586420166. The cubic root of 84198217 is about 438.2961255828.

The spelling of 84198217 in words is "eighty-four million, one hundred ninety-eight thousand, two hundred seventeen".