9906625 has 16 divisors (see below), whose sum is σ = 12671568. Its totient is φ = 7728000.

The previous prime is 9906599. The next prime is 9906653. The reversal of 9906625 is 5266099.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5049009 + 4857616 = 2247^2 + 2204^2 .

It is not a de Polignac number, because 9906625 - 2⁵ = 9906593 is a prime.

It is a Duffinian number.

9906625 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4159 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (791973).

Almost surely, 2^9906625 is an apocalyptic number.

It is an amenable number.

9906625 is a deficient number, since it is larger than the sum of its proper divisors (2764943).

9906625 is a wasteful number, since it uses less digits than its factorization.

9906625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 9906625 is about 3147.4791500501. The cubic root of 9906625 is about 214.7708031687.

The spelling of 9906625 in words is "nine million, nine hundred six thousand, six hundred twenty-five".