9987119 has 2 divisors, whose sum is σ = 9987120. Its totient is φ = 9987118.

The previous prime is 9987113. The next prime is 9987121. The reversal of 9987119 is 9117899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9987119 - 2⁸ = 9986863 is a prime.

It is a super-2 number, since 2×9987119² = 199485091840322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 9987121, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9987119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987113) 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 as a sum of consecutive naturals, namely, 4993559 + 4993560.

It is an arithmetic number, because the mean of its divisors is an integer number (4993560).

Almost surely, 2^9987119 is an apocalyptic number.

9987119 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987119 is an equidigital number, since it uses as much as digits as its factorization.

9987119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 44.

The square root of 9987119 is about 3160.2403389616. The cubic root of 9987119 is about 215.3509250124.

The spelling of 9987119 in words is "nine million, nine hundred eighty-seven thousand, one hundred nineteen".