9729687725 has 12 divisors (see below), whose sum is σ = 12076754196. Its totient is φ = 7776046080.

The previous prime is 9729687719. The next prime is 9729687731. The reversal of 9729687725 is 5277869279.

9729687725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9729687719) and next prime (9729687731).

It can be written as a sum of positive squares in 6 ways, for example, as 4749139396 + 4980548329 = 68914^2 + 70573^2 .

It is not a de Polignac number, because 9729687725 - 2¹⁸ = 9729425581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166772 + ... + 217421.

It is an arithmetic number, because the mean of its divisors is an integer number (1006396183).

Almost surely, 2^9729687725 is an apocalyptic number.

It is an amenable number.

9729687725 is a deficient number, since it is larger than the sum of its proper divisors (2347066471).

9729687725 is a wasteful number, since it uses less digits than its factorization.

9729687725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385216 (or 385211 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 62.

The square root of 9729687725 is about 98639.1794623212. The cubic root of 9729687725 is about 2134.8447638174.

The spelling of 9729687725 in words is "nine billion, seven hundred twenty-nine million, six hundred eighty-seven thousand, seven hundred twenty-five".