9724129 has 2 divisors, whose sum is σ = 9724130. Its totient is φ = 9724128.

The previous prime is 9724103. The next prime is 9724151. The reversal of 9724129 is 9214279.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9120400 + 603729 = 3020^2 + 777^2 .

It is a cyclic number.

It is not a de Polignac number, because 9724129 - 2⁵ = 9724097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9724094 and 9724103.

It is not a weakly prime, because it can be changed into another prime (9727129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4862064 + 4862065.

It is an arithmetic number, because the mean of its divisors is an integer number (4862065).

Almost surely, 2^9724129 is an apocalyptic number.

It is an amenable number.

9724129 is a deficient number, since it is larger than the sum of its proper divisors (1).

9724129 is an equidigital number, since it uses as much as digits as its factorization.

9724129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 9724129 is about 3118.3535719992. The cubic root of 9724129 is about 213.4438129471.

The spelling of 9724129 in words is "nine million, seven hundred twenty-four thousand, one hundred twenty-nine".