9900449 has 16 divisors (see below), whose sum is σ = 11088000. Its totient is φ = 8781696.

The previous prime is 9900437. The next prime is 9900461. The reversal of 9900449 is 9440099.

It is an interprime number because it is at equal distance from previous prime (9900437) and next prime (9900461).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9900449 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 (9900469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49652 + ... + 49850.

It is an arithmetic number, because the mean of its divisors is an integer number (693000).

Almost surely, 2^9900449 is an apocalyptic number.

It is an amenable number.

9900449 is a deficient number, since it is larger than the sum of its proper divisors (1187551).

9900449 is a wasteful number, since it uses less digits than its factorization.

9900449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 9900449 is about 3146.4978944852. The cubic root of 9900449 is about 214.7261630006.

The spelling of 9900449 in words is "nine million, nine hundred thousand, four hundred forty-nine".