9987247 has 2 divisors, whose sum is σ = 9987248. Its totient is φ = 9987246.

The previous prime is 9987209. The next prime is 9987253. The reversal of 9987247 is 7427899.

9987247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (7427899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9987247 - 2⁷ = 9987119 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9987197 and 9987206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993623 + 4993624.

It is an arithmetic number, because the mean of its divisors is an integer number (4993624).

Almost surely, 2^9987247 is an apocalyptic number.

9987247 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987247 is an equidigital number, since it uses as much as digits as its factorization.

9987247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 9987247 is about 3160.2605905210. The cubic root of 9987247 is about 215.3518450241.

The spelling of 9987247 in words is "nine million, nine hundred eighty-seven thousand, two hundred forty-seven".