9023721 has 8 divisors (see below), whose sum is σ = 13750464. Its totient is φ = 5156400.

The previous prime is 9023713. The next prime is 9023723. The reversal of 9023721 is 1273209.

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

It is not a de Polignac number, because 9023721 - 2³ = 9023713 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9023691 and 9023700.

It is not an unprimeable number, because it can be changed into a prime (9023723) 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, 214830 + ... + 214871.

It is an arithmetic number, because the mean of its divisors is an integer number (1718808).

Almost surely, 2^9023721 is an apocalyptic number.

It is an amenable number.

9023721 is a deficient number, since it is larger than the sum of its proper divisors (4726743).

9023721 is a wasteful number, since it uses less digits than its factorization.

9023721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429711.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 9023721 is about 3003.9508984003. The cubic root of 9023721 is about 208.1909689064.

The spelling of 9023721 in words is "nine million, twenty-three thousand, seven hundred twenty-one".