9221729 has 8 divisors (see below), whose sum is σ = 10274688. Its totient is φ = 8204560.

The previous prime is 9221717. The next prime is 9221741. The reversal of 9221729 is 9271229.

It is an interprime number because it is at equal distance from previous prime (9221717) and next prime (9221741).

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 9221729 - 2⁴ = 9221713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9221695 and 9221704.

It is not an unprimeable number, because it can be changed into a prime (9221789) 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, 8402 + ... + 9435.

It is an arithmetic number, because the mean of its divisors is an integer number (1284336).

Almost surely, 2^9221729 is an apocalyptic number.

It is an amenable number.

9221729 is a deficient number, since it is larger than the sum of its proper divisors (1052959).

9221729 is a wasteful number, since it uses less digits than its factorization.

9221729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17895.

The product of its digits is 4536, while the sum is 32.

The square root of 9221729 is about 3036.7299847039. The cubic root of 9221729 is about 209.7027464829.

The spelling of 9221729 in words is "nine million, two hundred twenty-one thousand, seven hundred twenty-nine".