84320447 has 8 divisors (see below), whose sum is σ = 87645936. Its totient is φ = 81050112.

The previous prime is 84320443. The next prime is 84320501. The reversal of 84320447 is 74402348.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84320447 - 2² = 84320443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84320443) 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 7 ways as a sum of consecutive naturals, for example, 10658 + ... + 16799.

It is an arithmetic number, because the mean of its divisors is an integer number (10955742).

Almost surely, 2^84320447 is an apocalyptic number.

84320447 is a deficient number, since it is larger than the sum of its proper divisors (3325489).

84320447 is a wasteful number, since it uses less digits than its factorization.

84320447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27577.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 84320447 is about 9182.6165660992. The cubic root of 84320447 is about 438.5081135733.

The spelling of 84320447 in words is "eighty-four million, three hundred twenty thousand, four hundred forty-seven".