9925609 has 4 divisors (see below), whose sum is σ = 9946000. Its totient is φ = 9905220.

The previous prime is 9925607. The next prime is 9925613. The reversal of 9925609 is 9065299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9925609 - 2¹ = 9925607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9925607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9447 + ... + 10444.

It is an arithmetic number, because the mean of its divisors is an integer number (2486500).

Almost surely, 2^9925609 is an apocalyptic number.

It is an amenable number.

9925609 is a deficient number, since it is larger than the sum of its proper divisors (20391).

9925609 is a wasteful number, since it uses less digits than its factorization.

9925609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20390.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 9925609 is about 3150.4934534133. The cubic root of 9925609 is about 214.9079035879.

The spelling of 9925609 in words is "nine million, nine hundred twenty-five thousand, six hundred nine".