9985787 has 4 divisors (see below), whose sum is σ = 11412336. Its totient is φ = 8559240.

The previous prime is 9985771. The next prime is 9985799. The reversal of 9985787 is 7875899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7875899 = 19 ⋅414521.

It is a cyclic number.

It is not a de Polignac number, because 9985787 - 2⁴ = 9985771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9985187) 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, 713264 + ... + 713277.

It is an arithmetic number, because the mean of its divisors is an integer number (2853084).

Almost surely, 2^9985787 is an apocalyptic number.

9985787 is a deficient number, since it is larger than the sum of its proper divisors (1426549).

9985787 is a wasteful number, since it uses less digits than its factorization.

9985787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426548.

The product of its digits is 1270080, while the sum is 53.

The square root of 9985787 is about 3160.0295884691. The cubic root of 9985787 is about 215.3413506735.

The spelling of 9985787 in words is "nine million, nine hundred eighty-five thousand, seven hundred eighty-seven".