9329721 has 8 divisors (see below), whose sum is σ = 12455424. Its totient is φ = 6211920.

The previous prime is 9329707. The next prime is 9329759. The reversal of 9329721 is 1279239.

9329721 is digitally balanced in base 2 and base 4, because in such bases 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 not a de Polignac number, because 9329721 - 2²¹ = 7232569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9329521) 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, 1831 + ... + 4691.

It is an arithmetic number, because the mean of its divisors is an integer number (1556928).

Almost surely, 2^9329721 is an apocalyptic number.

It is an amenable number.

9329721 is a deficient number, since it is larger than the sum of its proper divisors (3125703).

9329721 is a wasteful number, since it uses less digits than its factorization.

9329721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951.

The product of its digits is 6804, while the sum is 33.

The square root of 9329721 is about 3054.4591992692. The cubic root of 9329721 is about 210.5181535640.

The spelling of 9329721 in words is "nine million, three hundred twenty-nine thousand, seven hundred twenty-one".