83856705 has 16 divisors (see below), whose sum is σ = 138499584. Its totient is φ = 43280640.

The previous prime is 83856677. The next prime is 83856713. The reversal of 83856705 is 50765838.

It is not a de Polignac number, because 83856705 - 2²⁰ = 82808129 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89704 + ... + 90633.

It is an arithmetic number, because the mean of its divisors is an integer number (8656224).

Almost surely, 2^83856705 is an apocalyptic number.

It is an amenable number.

83856705 is a deficient number, since it is larger than the sum of its proper divisors (54642879).

83856705 is a wasteful number, since it uses less digits than its factorization.

83856705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180376.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 83856705 is about 9157.3306700151. The cubic root of 83856705 is about 437.7027392326.

The spelling of 83856705 in words is "eighty-three million, eight hundred fifty-six thousand, seven hundred five".