8697221 has 8 divisors (see below), whose sum is σ = 9439584. Its totient is φ = 7965360.

The previous prime is 8697163. The next prime is 8697233. The reversal of 8697221 is 1227968.

It is a happy number.

8697221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-8697221 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 (8690221) 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, 851 + ... + 4256.

It is an arithmetic number, because the mean of its divisors is an integer number (1179948).

Almost surely, 2^8697221 is an apocalyptic number.

8697221 is the 1703-rd octagonal number.

It is an amenable number.

8697221 is a deficient number, since it is larger than the sum of its proper divisors (742363).

8697221 is a wasteful number, since it uses less digits than its factorization.

8697221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251.

The product of its digits is 12096, while the sum is 35.

The square root of 8697221 is about 2949.1051185063. The cubic root of 8697221 is about 205.6491104478.

The spelling of 8697221 in words is "eight million, six hundred ninety-seven thousand, two hundred twenty-one".