9724489 has 2 divisors, whose sum is σ = 9724490. Its totient is φ = 9724488.

The previous prime is 9724487. The next prime is 9724531. The reversal of 9724489 is 9844279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9560464 + 164025 = 3092^2 + 405^2 .

It is an emirp because it is prime and its reverse (9844279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9724489 - 2¹ = 9724487 is a prime.

It is a super-2 number, since 2×9724489² = 189131372622242, which contains 22 as substring.

Together with 9724487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9724487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4862244 + 4862245.

It is an arithmetic number, because the mean of its divisors is an integer number (4862245).

Almost surely, 2^9724489 is an apocalyptic number.

It is an amenable number.

9724489 is a deficient number, since it is larger than the sum of its proper divisors (1).

9724489 is an equidigital number, since it uses as much as digits as its factorization.

9724489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 9724489 is about 3118.4112942330. The cubic root of 9724489 is about 213.4464469045.

The spelling of 9724489 in words is "nine million, seven hundred twenty-four thousand, four hundred eighty-nine".