84866321 has 2 divisors, whose sum is σ = 84866322. Its totient is φ = 84866320.

The previous prime is 84866291. The next prime is 84866333. The reversal of 84866321 is 12366848.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48094225 + 36772096 = 6935^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 84866321 - 2¹⁴ = 84849937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84866381) 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, 42433160 + 42433161.

It is an arithmetic number, because the mean of its divisors is an integer number (42433161).

Almost surely, 2^84866321 is an apocalyptic number.

It is an amenable number.

84866321 is a deficient number, since it is larger than the sum of its proper divisors (1).

84866321 is an equidigital number, since it uses as much as digits as its factorization.

84866321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 84866321 is about 9212.2918429672. The cubic root of 84866321 is about 439.4523506717.

The spelling of 84866321 in words is "eighty-four million, eight hundred sixty-six thousand, three hundred twenty-one".