84009321 has 12 divisors (see below), whose sum is σ = 132378480. Its totient is φ = 50914680.

The previous prime is 84009307. The next prime is 84009347. The reversal of 84009321 is 12390048.

It is not a de Polignac number, because 84009321 - 2⁷ = 84009193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84009221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 424191 + ... + 424388.

It is an arithmetic number, because the mean of its divisors is an integer number (11031540).

Almost surely, 2^84009321 is an apocalyptic number.

It is an amenable number.

84009321 is a deficient number, since it is larger than the sum of its proper divisors (48369159).

84009321 is a wasteful number, since it uses less digits than its factorization.

84009321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848596 (or 848593 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 84009321 is about 9165.6598780448. The cubic root of 84009321 is about 437.9681123968.

Adding to 84009321 its reverse (12390048), we get a palindrome (96399369).

The spelling of 84009321 in words is "eighty-four million, nine thousand, three hundred twenty-one".