9987443 has 2 divisors, whose sum is σ = 9987444. Its totient is φ = 9987442.

The previous prime is 9987433. The next prime is 9987457. The reversal of 9987443 is 3447899.

9987443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9987443 - 2⁴ = 9987427 is a prime.

It is a Sophie Germain prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9987394 and 9987403.

It is not a weakly prime, because it can be changed into another prime (9987403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993721 + 4993722.

It is an arithmetic number, because the mean of its divisors is an integer number (4993722).

Almost surely, 2^9987443 is an apocalyptic number.

9987443 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987443 is an equidigital number, since it uses as much as digits as its factorization.

9987443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 9987443 is about 3160.2916004698. The cubic root of 9987443 is about 215.3532537769.

The spelling of 9987443 in words is "nine million, nine hundred eighty-seven thousand, four hundred forty-three".