9987385 has 8 divisors (see below), whose sum is σ = 12104136. Its totient is φ = 7910400.

The previous prime is 9987323. The next prime is 9987389. The reversal of 9987385 is 5837899.

It can be written as a sum of positive squares in 4 ways, for example, as 3164841 + 6822544 = 1779^2 + 2612^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9987385 - 2¹⁵ = 9954617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9987389) 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 7 ways as a sum of consecutive naturals, for example, 9384 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (1513017).

Almost surely, 2^9987385 is an apocalyptic number.

It is an amenable number.

9987385 is a deficient number, since it is larger than the sum of its proper divisors (2116751).

9987385 is a wasteful number, since it uses less digits than its factorization.

9987385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19883.

The product of its digits is 544320, while the sum is 49.

The square root of 9987385 is about 3160.2824240881. The cubic root of 9987385 is about 215.3528369030.

The spelling of 9987385 in words is "nine million, nine hundred eighty-seven thousand, three hundred eighty-five".