9987243 has 8 divisors (see below), whose sum is σ = 15218688. Its totient is φ = 5706984.

The previous prime is 9987209. The next prime is 9987247. The reversal of 9987243 is 3427899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9987243 - 2⁸ = 9986987 is a prime.

It is a super-3 number, since 3×9987243³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

9987243 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9987195 and 9987204.

It is not an unprimeable number, because it can be changed into a prime (9987247) 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 7 ways as a sum of consecutive naturals, for example, 237771 + ... + 237812.

It is an arithmetic number, because the mean of its divisors is an integer number (1902336).

Almost surely, 2^9987243 is an apocalyptic number.

9987243 is a deficient number, since it is larger than the sum of its proper divisors (5231445).

9987243 is a wasteful number, since it uses less digits than its factorization.

9987243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475593.

The product of its digits is 108864, while the sum is 42.

The square root of 9987243 is about 3160.2599576617. The cubic root of 9987243 is about 215.3518162739.

The spelling of 9987243 in words is "nine million, nine hundred eighty-seven thousand, two hundred forty-three".