9689987 has 2 divisors, whose sum is σ = 9689988. Its totient is φ = 9689986.

The previous prime is 9689957. The next prime is 9689989. The reversal of 9689987 is 7899869.

It is a strong prime.

It is an emirp because it is prime and its reverse (7899869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9689987 - 2⁸ = 9689731 is a prime.

Together with 9689989, 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 (9689989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844993 + 4844994.

It is an arithmetic number, because the mean of its divisors is an integer number (4844994).

Almost surely, 2^9689987 is an apocalyptic number.

9689987 is a deficient number, since it is larger than the sum of its proper divisors (1).

9689987 is an equidigital number, since it uses as much as digits as its factorization.

9689987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 56.

The square root of 9689987 is about 3112.8743951531. The cubic root of 9689987 is about 213.1937153405.

The spelling of 9689987 in words is "nine million, six hundred eighty-nine thousand, nine hundred eighty-seven".