9999449 has 4 divisors (see below), whose sum is σ = 10243380. Its totient is φ = 9755520.

The previous prime is 9999433. The next prime is 9999463. The reversal of 9999449 is 9449999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9449999 = 13 ⋅726923.

It can be written as a sum of positive squares in 2 ways, for example, as 2271049 + 7728400 = 1507^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999449 - 2⁴ = 9999433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9999449.

It is not an unprimeable number, because it can be changed into a prime (9999419) 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, 121904 + ... + 121985.

It is an arithmetic number, because the mean of its divisors is an integer number (2560845).

Almost surely, 2^9999449 is an apocalyptic number.

It is an amenable number.

9999449 is a deficient number, since it is larger than the sum of its proper divisors (243931).

9999449 is a wasteful number, since it uses less digits than its factorization.

9999449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243930.

The product of its digits is 944784, while the sum is 53.

The square root of 9999449 is about 3162.1905382187. The cubic root of 9999449 is about 215.4395119521.

The spelling of 9999449 in words is "nine million, nine hundred ninety-nine thousand, four hundred forty-nine".