9872087 has 4 divisors (see below), whose sum is σ = 10452816. Its totient is φ = 9291360.

The previous prime is 9872063. The next prime is 9872089. The reversal of 9872087 is 7802789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7802789 = 179 ⋅43591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9872087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872089) 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 3 ways as a sum of consecutive naturals, for example, 290339 + ... + 290372.

It is an arithmetic number, because the mean of its divisors is an integer number (2613204).

Almost surely, 2^9872087 is an apocalyptic number.

9872087 is a deficient number, since it is larger than the sum of its proper divisors (580729).

9872087 is a wasteful number, since it uses less digits than its factorization.

9872087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580728.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 9872087 is about 3141.9877466343. The cubic root of 9872087 is about 214.5209235498.

The spelling of 9872087 in words is "nine million, eight hundred seventy-two thousand, eighty-seven".