9862987 has 4 divisors (see below), whose sum is σ = 10203120. Its totient is φ = 9522856.

The previous prime is 9862981. The next prime is 9862999. The reversal of 9862987 is 7892689.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7892689 = 7 ⋅1127527.

It is a cyclic number.

It is not a de Polignac number, because 9862987 - 2¹⁹ = 9338699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9862987.

It is not an unprimeable number, because it can be changed into a prime (9862981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170023 + ... + 170080.

It is an arithmetic number, because the mean of its divisors is an integer number (2550780).

Almost surely, 2^9862987 is an apocalyptic number.

9862987 is a deficient number, since it is larger than the sum of its proper divisors (340133).

9862987 is a wasteful number, since it uses less digits than its factorization.

9862987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340132.

The product of its digits is 435456, while the sum is 49.

The square root of 9862987 is about 3140.5392849000. The cubic root of 9862987 is about 214.4549888076.

The spelling of 9862987 in words is "nine million, eight hundred sixty-two thousand, nine hundred eighty-seven".