84770321 has 4 divisors (see below), whose sum is σ = 84862500. Its totient is φ = 84678144.

The previous prime is 84770299. The next prime is 84770333. The reversal of 84770321 is 12307748.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 846400 + 83923921 = 920^2 + 9161^2 .

It is a cyclic number.

It is not a de Polignac number, because 84770321 - 2¹⁴ = 84753937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84770351) 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 in 3 ways as a sum of consecutive naturals, for example, 44696 + ... + 46553.

It is an arithmetic number, because the mean of its divisors is an integer number (21215625).

Almost surely, 2^84770321 is an apocalyptic number.

It is an amenable number.

84770321 is a deficient number, since it is larger than the sum of its proper divisors (92179).

84770321 is an equidigital number, since it uses as much as digits as its factorization.

84770321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92178.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 84770321 is about 9207.0799388297. The cubic root of 84770321 is about 439.2865866697.

The spelling of 84770321 in words is "eighty-four million, seven hundred seventy thousand, three hundred twenty-one".