8998221 has 8 divisors (see below), whose sum is σ = 12519360. Its totient is φ = 5737952.

The previous prime is 8998211. The next prime is 8998243. The reversal of 8998221 is 1228998.

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 8998221 - 2⁵ = 8998189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8998221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8998211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65136 + ... + 65273.

It is an arithmetic number, because the mean of its divisors is an integer number (1564920).

Almost surely, 2^8998221 is an apocalyptic number.

It is an amenable number.

8998221 is a deficient number, since it is larger than the sum of its proper divisors (3521139).

8998221 is a wasteful number, since it uses less digits than its factorization.

8998221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130435.

The product of its digits is 20736, while the sum is 39.

The square root of 8998221 is about 2999.7034853465. The cubic root of 8998221 is about 207.9946759609.

The spelling of 8998221 in words is "eight million, nine hundred ninety-eight thousand, two hundred twenty-one".