9119987 has 2 divisors, whose sum is σ = 9119988. Its totient is φ = 9119986.

The previous prime is 9119977. The next prime is 9119989. The reversal of 9119987 is 7899119.

9119987 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9119987 - 2⁸ = 9119731 is a prime.

Together with 9119989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9119989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4559993 + 4559994.

It is an arithmetic number, because the mean of its divisors is an integer number (4559994).

Almost surely, 2^9119987 is an apocalyptic number.

9119987 is a deficient number, since it is larger than the sum of its proper divisors (1).

9119987 is an equidigital number, since it uses as much as digits as its factorization.

9119987 is an evil number, because the sum of its binary digits is even.

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

The square root of 9119987 is about 3019.9316217425. The cubic root of 9119987 is about 208.9286860927.

The spelling of 9119987 in words is "nine million, one hundred nineteen thousand, nine hundred eighty-seven".