84468217 has 2 divisors, whose sum is σ = 84468218. Its totient is φ = 84468216.

The previous prime is 84468193. The next prime is 84468229. The reversal of 84468217 is 71286448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79905721 + 4562496 = 8939^2 + 2136^2 .

It is a cyclic number.

It is not a de Polignac number, because 84468217 - 2⁷ = 84468089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84468217.

It is not a weakly prime, because it can be changed into another prime (84478217) 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, 42234108 + 42234109.

It is an arithmetic number, because the mean of its divisors is an integer number (42234109).

Almost surely, 2^84468217 is an apocalyptic number.

It is an amenable number.

84468217 is a deficient number, since it is larger than the sum of its proper divisors (1).

84468217 is an equidigital number, since it uses as much as digits as its factorization.

84468217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 40.

The square root of 84468217 is about 9190.6592255398. The cubic root of 84468217 is about 438.7641231591.

The spelling of 84468217 in words is "eighty-four million, four hundred sixty-eight thousand, two hundred seventeen".