9713221 has 12 divisors (see below), whose sum is σ = 11376288. Its totient is φ = 8268792.

The previous prime is 9713219. The next prime is 9713279. The reversal of 9713221 is 1223179.

It is not a de Polignac number, because 9713221 - 2¹ = 9713219 is a prime.

9713221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9713201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7590 + ... + 8776.

It is an arithmetic number, because the mean of its divisors is an integer number (948024).

Almost surely, 2^9713221 is an apocalyptic number.

It is an amenable number.

9713221 is a deficient number, since it is larger than the sum of its proper divisors (1663067).

9713221 is a wasteful number, since it uses less digits than its factorization.

9713221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 1361 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 9713221 is about 3116.6040813681. The cubic root of 9713221 is about 213.3639731925.

The spelling of 9713221 in words is "nine million, seven hundred thirteen thousand, two hundred twenty-one".