84821845 has 8 divisors (see below), whose sum is σ = 102564000. Its totient is φ = 67338960.

The previous prime is 84821837. The next prime is 84821851. The reversal of 84821845 is 54812848.

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

It is not a de Polignac number, because 84821845 - 2³ = 84821837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84821798 and 84821807.

It is a congruent number.

It is an unprimeable number.

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, 64095 + ... + 65404.

It is an arithmetic number, because the mean of its divisors is an integer number (12820500).

Almost surely, 2^84821845 is an apocalyptic number.

It is an amenable number.

84821845 is a deficient number, since it is larger than the sum of its proper divisors (17742155).

84821845 is a wasteful number, since it uses less digits than its factorization.

84821845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129635.

The product of its digits is 81920, while the sum is 40.

The square root of 84821845 is about 9209.8775779051. The cubic root of 84821845 is about 439.3755691411.

The spelling of 84821845 in words is "eighty-four million, eight hundred twenty-one thousand, eight hundred forty-five".