84213317 has 2 divisors, whose sum is σ = 84213318. Its totient is φ = 84213316.

The previous prime is 84213299. The next prime is 84213347. The reversal of 84213317 is 71331248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83649316 + 564001 = 9146^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 84213317 - 2²⁶ = 17104453 is a prime.

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 84213317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84213347) 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, 42106658 + 42106659.

It is an arithmetic number, because the mean of its divisors is an integer number (42106659).

Almost surely, 2^84213317 is an apocalyptic number.

It is an amenable number.

84213317 is a deficient number, since it is larger than the sum of its proper divisors (1).

84213317 is an equidigital number, since it uses as much as digits as its factorization.

84213317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 84213317 is about 9176.7814074435. The cubic root of 84213317 is about 438.3223251712.

The spelling of 84213317 in words is "eighty-four million, two hundred thirteen thousand, three hundred seventeen".