9878787 has 16 divisors (see below), whose sum is σ = 14683680. Its totient is φ = 6564096.

The previous prime is 9878773. The next prime is 9878797. The reversal of 9878787 is 7878789.

9878787 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

9878787 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 9878787 - 2¹² = 9874691 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (9878747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15703 + ... + 16319.

It is an arithmetic number, because the mean of its divisors is an integer number (917730).

Almost surely, 2^9878787 is an apocalyptic number.

9878787 is a deficient number, since it is larger than the sum of its proper divisors (4804893).

9878787 is a wasteful number, since it uses less digits than its factorization.

9878787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219 (or 1213 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 54.

The square root of 9878787 is about 3143.0537698232. The cubic root of 9878787 is about 214.5694430154.

The spelling of 9878787 in words is "nine million, eight hundred seventy-eight thousand, seven hundred eighty-seven".