9806987 has 4 divisors (see below), whose sum is σ = 9813336. Its totient is φ = 9800640.

The previous prime is 9806971. The next prime is 9806989. The reversal of 9806987 is 7896089.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9806987 - 2⁴ = 9806971 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9806989) 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 3 ways as a sum of consecutive naturals, for example, 812 + ... + 4502.

It is an arithmetic number, because the mean of its divisors is an integer number (2453334).

Almost surely, 2^9806987 is an apocalyptic number.

9806987 is a deficient number, since it is larger than the sum of its proper divisors (6349).

9806987 is a wasteful number, since it uses less digits than its factorization.

9806987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 9806987 is about 3131.6109273024. The cubic root of 9806987 is about 214.0483411915.

The spelling of 9806987 in words is "nine million, eight hundred six thousand, nine hundred eighty-seven".