9813729 has 8 divisors (see below), whose sum is σ = 13109152. Its totient is φ = 6530400.

The previous prime is 9813703. The next prime is 9813731. The reversal of 9813729 is 9273189.

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

It is not a de Polignac number, because 9813729 - 2⁹ = 9813217 is a prime.

It is a Duffinian number.

9813729 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9813829) 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, 919 + ... + 4524.

It is an arithmetic number, because the mean of its divisors is an integer number (1638644).

Almost surely, 2^9813729 is an apocalyptic number.

It is an amenable number.

9813729 is a deficient number, since it is larger than the sum of its proper divisors (3295423).

9813729 is a wasteful number, since it uses less digits than its factorization.

9813729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047.

The product of its digits is 27216, while the sum is 39.

The square root of 9813729 is about 3132.6871851495. The cubic root of 9813729 is about 214.0973804919.

The spelling of 9813729 in words is "nine million, eight hundred thirteen thousand, seven hundred twenty-nine".