9987449 has 4 divisors (see below), whose sum is σ = 10574964. Its totient is φ = 9399936.

The previous prime is 9987443. The next prime is 9987457. The reversal of 9987449 is 9447899.

9987449 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9447899 = 71 ⋅133069.

It can be written as a sum of positive squares in 2 ways, for example, as 7661824 + 2325625 = 2768^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 9987449 - 2⁴ = 9987433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9987397 and 9987406.

It is not an unprimeable number, because it can be changed into a prime (9987443) 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, 293732 + ... + 293765.

It is an arithmetic number, because the mean of its divisors is an integer number (2643741).

Almost surely, 2^9987449 is an apocalyptic number.

It is an amenable number.

9987449 is a deficient number, since it is larger than the sum of its proper divisors (587515).

9987449 is a wasteful number, since it uses less digits than its factorization.

9987449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587514.

The product of its digits is 653184, while the sum is 50.

The square root of 9987449 is about 3160.2925497492. The cubic root of 9987449 is about 215.3532969017.

The spelling of 9987449 in words is "nine million, nine hundred eighty-seven thousand, four hundred forty-nine".