9899409 has 24 divisors (see below), whose sum is σ = 14666176. Its totient is φ = 5904000.

The previous prime is 9899377. The next prime is 9899429. The reversal of 9899409 is 9049989.

It is a happy number.

It is not a de Polignac number, because 9899409 - 2⁵ = 9899377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9899429) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 65484 + ... + 65634.

Almost surely, 2^9899409 is an apocalyptic number.

It is an amenable number.

9899409 is a deficient number, since it is larger than the sum of its proper divisors (4766767).

9899409 is a wasteful number, since it uses less digits than its factorization.

9899409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 9899409 is about 3146.3326270437. The cubic root of 9899409 is about 214.7186440477.

The spelling of 9899409 in words is "nine million, eight hundred ninety-nine thousand, four hundred nine".