9438729 has 4 divisors (see below), whose sum is σ = 12584976. Its totient is φ = 6292484.

The previous prime is 9438727. The next prime is 9438731. The reversal of 9438729 is 9278349.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9278349 = 3 ⋅3092783.

It is an interprime number because it is at equal distance from previous prime (9438727) and next prime (9438731).

It is a cyclic number.

It is not a de Polignac number, because 9438729 - 2¹ = 9438727 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (9438721) 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, 1573119 + ... + 1573124.

It is an arithmetic number, because the mean of its divisors is an integer number (3146244).

Almost surely, 2^9438729 is an apocalyptic number.

It is an amenable number.

9438729 is a deficient number, since it is larger than the sum of its proper divisors (3146247).

9438729 is a wasteful number, since it uses less digits than its factorization.

9438729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146246.

The product of its digits is 108864, while the sum is 42.

The square root of 9438729 is about 3072.2514545525. The cubic root of 9438729 is about 211.3348755030.

The spelling of 9438729 in words is "nine million, four hundred thirty-eight thousand, seven hundred twenty-nine".