9724239 has 32 divisors (see below), whose sum is σ = 17187840. Its totient is φ = 5312736.

The previous prime is 9724223. The next prime is 9724241. The reversal of 9724239 is 9324279.

It is not a de Polignac number, because 9724239 - 2⁴ = 9724223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9724259) 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 31 ways as a sum of consecutive naturals, for example, 3229 + ... + 5465.

It is an arithmetic number, because the mean of its divisors is an integer number (537120).

Almost surely, 2^9724239 is an apocalyptic number.

9724239 is a deficient number, since it is larger than the sum of its proper divisors (7463601).

9724239 is a wasteful number, since it uses less digits than its factorization.

9724239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276 (or 2270 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 9724239 is about 3118.3712094618. The cubic root of 9724239 is about 213.4446177743. Note that the first 3 decimals are identical.

It can be divided in two parts, 97 and 24239, that added together give a square (24336 = 156²).

The spelling of 9724239 in words is "nine million, seven hundred twenty-four thousand, two hundred thirty-nine".