9409729 has 16 divisors (see below), whose sum is σ = 11294208. Its totient is φ = 7670592.

The previous prime is 9409727. The next prime is 9409747. The reversal of 9409729 is 9279049.

It is a cyclic number.

It is not a de Polignac number, because 9409729 - 2¹ = 9409727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9409691 and 9409700.

It is not an unprimeable number, because it can be changed into a prime (9409723) 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 15 ways as a sum of consecutive naturals, for example, 11787 + ... + 12559.

It is an arithmetic number, because the mean of its divisors is an integer number (705888).

Almost surely, 2^9409729 is an apocalyptic number.

It is an amenable number.

9409729 is a deficient number, since it is larger than the sum of its proper divisors (1884479).

9409729 is a wasteful number, since it uses less digits than its factorization.

9409729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 9409729 is about 3067.5281579800. The cubic root of 9409729 is about 211.1182150169.

It can be divided in two parts, 9409 and 729, that multiplied together give a square (6859161 = 2619²).

The spelling of 9409729 in words is "nine million, four hundred nine thousand, seven hundred twenty-nine".