83856817 has 8 divisors (see below), whose sum is σ = 92043360. Its totient is φ = 75764160.

The previous prime is 83856811. The next prime is 83856821. The reversal of 83856817 is 71865838.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83856817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83856811) 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 7 ways as a sum of consecutive naturals, for example, 21592 + ... + 25177.

It is an arithmetic number, because the mean of its divisors is an integer number (11505420).

Almost surely, 2^83856817 is an apocalyptic number.

It is an amenable number.

83856817 is a deficient number, since it is larger than the sum of its proper divisors (8186543).

83856817 is a wasteful number, since it uses less digits than its factorization.

83856817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46943.

The product of its digits is 322560, while the sum is 46.

The square root of 83856817 is about 9157.3367853323. The cubic root of 83856817 is about 437.7029340995.

The spelling of 83856817 in words is "eighty-three million, eight hundred fifty-six thousand, eight hundred seventeen".