9399729 has 4 divisors (see below), whose sum is σ = 12532976. Its totient is φ = 6266484.

The previous prime is 9399653. The next prime is 9399743. The reversal of 9399729 is 9279939.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9399729 - 2⁷ = 9399601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9399749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566619 + ... + 1566624.

It is an arithmetic number, because the mean of its divisors is an integer number (3133244).

Almost surely, 2^9399729 is an apocalyptic number.

It is an amenable number.

9399729 is a deficient number, since it is larger than the sum of its proper divisors (3133247).

9399729 is a wasteful number, since it uses less digits than its factorization.

9399729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133246.

The product of its digits is 275562, while the sum is 48.

The square root of 9399729 is about 3065.8977478057. The cubic root of 9399729 is about 211.0434012979.

The spelling of 9399729 in words is "nine million, three hundred ninety-nine thousand, seven hundred twenty-nine".