84670221 has 8 divisors (see below), whose sum is σ = 112945120. Its totient is φ = 56421072.

The previous prime is 84670189. The next prime is 84670237. The reversal of 84670221 is 12207648.

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

It is not a de Polignac number, because 84670221 - 2⁵ = 84670189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84670121) 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, 3375 + ... + 13443.

It is an arithmetic number, because the mean of its divisors is an integer number (14118140).

Almost surely, 2^84670221 is an apocalyptic number.

It is an amenable number.

84670221 is a deficient number, since it is larger than the sum of its proper divisors (28274899).

84670221 is a wasteful number, since it uses less digits than its factorization.

84670221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12875.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 84670221 is about 9201.6422990681. The cubic root of 84670221 is about 439.1136098293.

Adding to 84670221 its reverse (12207648), we get a palindrome (96877869).

The spelling of 84670221 in words is "eighty-four million, six hundred seventy thousand, two hundred twenty-one".