9987441 has 4 divisors (see below), whose sum is σ = 13316592. Its totient is φ = 6658292.

The previous prime is 9987433. The next prime is 9987443. The reversal of 9987441 is 1447899.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1447899 = 3 ⋅482633.

It is a cyclic number.

It is not a de Polignac number, because 9987441 - 2³ = 9987433 is a prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9987393 and 9987402.

It is not an unprimeable number, because it can be changed into a prime (9987443) 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 3 ways as a sum of consecutive naturals, for example, 1664571 + ... + 1664576.

It is an arithmetic number, because the mean of its divisors is an integer number (3329148).

Almost surely, 2^9987441 is an apocalyptic number.

It is an amenable number.

9987441 is a deficient number, since it is larger than the sum of its proper divisors (3329151).

9987441 is a wasteful number, since it uses less digits than its factorization.

9987441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329150.

The product of its digits is 72576, while the sum is 42.

The square root of 9987441 is about 3160.2912840433. The cubic root of 9987441 is about 215.3532394019.

The spelling of 9987441 in words is "nine million, nine hundred eighty-seven thousand, four hundred forty-one".