9987825 has 48 divisors (see below), whose sum is σ = 17895680. Its totient is φ = 4898880.

The previous prime is 9987793. The next prime is 9987827. The reversal of 9987825 is 5287899.

It is a happy number.

9987825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9987825 - 2⁵ = 9987793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9987827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61194 + ... + 61356.

Almost surely, 2^9987825 is an apocalyptic number.

9987825 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9987825 is a deficient number, since it is larger than the sum of its proper divisors (7907855).

9987825 is a wasteful number, since it uses less digits than its factorization.

9987825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 233 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The square root of 9987825 is about 3160.3520373528. The cubic root of 9987825 is about 215.3559993543.

The spelling of 9987825 in words is "nine million, nine hundred eighty-seven thousand, eight hundred twenty-five".