9870987 has 32 divisors (see below), whose sum is σ = 15685632. Its totient is φ = 5405184.

The previous prime is 9870983. The next prime is 9871007. The reversal of 9870987 is 7890789.

It is not a de Polignac number, because 9870987 - 2² = 9870983 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (9870983) 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 in 31 ways as a sum of consecutive naturals, for example, 71983 + ... + 72119.

It is an arithmetic number, because the mean of its divisors is an integer number (490176).

Almost surely, 2^9870987 is an apocalyptic number.

9870987 is a deficient number, since it is larger than the sum of its proper divisors (5814645).

9870987 is a wasteful number, since it uses less digits than its factorization.

9870987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 9870987 is about 3141.8126933349. The cubic root of 9870987 is about 214.5129555696.

The spelling of 9870987 in words is "nine million, eight hundred seventy thousand, nine hundred eighty-seven".