84856447 has 16 divisors (see below), whose sum is σ = 93184000. Its totient is φ = 76803552.

The previous prime is 84856439. The next prime is 84856477. The reversal of 84856447 is 74465848.

It is a cyclic number.

It is not a de Polignac number, because 84856447 - 2³ = 84856439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84856397 and 84856406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84856417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169804 + ... + 170302.

It is an arithmetic number, because the mean of its divisors is an integer number (5824000).

Almost surely, 2^84856447 is an apocalyptic number.

84856447 is a deficient number, since it is larger than the sum of its proper divisors (8327553).

84856447 is a wasteful number, since it uses less digits than its factorization.

84856447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742.

The product of its digits is 860160, while the sum is 46.

The square root of 84856447 is about 9211.7559129625. The cubic root of 84856447 is about 439.4353069228.

The spelling of 84856447 in words is "eighty-four million, eight hundred fifty-six thousand, four hundred forty-seven".