9925709 has 2 divisors, whose sum is σ = 9925710. Its totient is φ = 9925708.

The previous prime is 9925703. The next prime is 9925711. The reversal of 9925709 is 9075299.

9925709 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7823209 + 2102500 = 2797^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 9925709 - 2²⁰ = 8877133 is a prime.

Together with 9925711, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9925703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4962854 + 4962855.

It is an arithmetic number, because the mean of its divisors is an integer number (4962855).

Almost surely, 2^9925709 is an apocalyptic number.

It is an amenable number.

9925709 is a deficient number, since it is larger than the sum of its proper divisors (1).

9925709 is an equidigital number, since it uses as much as digits as its factorization.

9925709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 9925709 is about 3150.5093239030. The cubic root of 9925709 is about 214.9086253142.

The spelling of 9925709 in words is "nine million, nine hundred twenty-five thousand, seven hundred nine".