84823217 has 8 divisors (see below), whose sum is σ = 90142056. Its totient is φ = 79540992.

The previous prime is 84823213. The next prime is 84823229. The reversal of 84823217 is 71232848.

It can be written as a sum of positive squares in 4 ways, for example, as 28633201 + 56190016 = 5351^2 + 7496^2 .

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 84823217 - 2² = 84823213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84823213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4298 + ... + 13715.

It is an arithmetic number, because the mean of its divisors is an integer number (11267757).

Almost surely, 2^84823217 is an apocalyptic number.

It is an amenable number.

84823217 is a deficient number, since it is larger than the sum of its proper divisors (5318839).

84823217 is a wasteful number, since it uses less digits than its factorization.

84823217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18307.

The product of its digits is 21504, while the sum is 35.

The square root of 84823217 is about 9209.9520628503. The cubic root of 84823217 is about 439.3779381064.

The spelling of 84823217 in words is "eighty-four million, eight hundred twenty-three thousand, two hundred seventeen".