9903825 has 18 divisors (see below), whose sum is σ = 17739254. Its totient is φ = 5281920.

The previous prime is 9903821. The next prime is 9903847. The reversal of 9903825 is 5283099.

It can be written as a sum of positive squares in 3 ways, for example, as 1557504 + 8346321 = 1248^2 + 2889^2 .

It is not a de Polignac number, because 9903825 - 2² = 9903821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9903825.

It is not an unprimeable number, because it can be changed into a prime (9903821) 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 in 17 ways as a sum of consecutive naturals, for example, 21784 + ... + 22233.

Almost surely, 2^9903825 is an apocalyptic number.

It is an amenable number.

9903825 is a deficient number, since it is larger than the sum of its proper divisors (7835429).

9903825 is a wasteful number, since it uses less digits than its factorization.

9903825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44033 (or 44025 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 9903825 is about 3147.0343182114. The cubic root of 9903825 is about 214.7505670502.

The spelling of 9903825 in words is "nine million, nine hundred three thousand, eight hundred twenty-five".