9878947 has 8 divisors (see below), whose sum is σ = 10666544. Its totient is φ = 9095328.

The previous prime is 9878929. The next prime is 9879007. The reversal of 9878947 is 7498789.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9878947 - 2¹¹ = 9876899 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9878894 and 9878903.

It is not an unprimeable number, because it can be changed into a prime (9878927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6073 + ... + 7525.

It is an arithmetic number, because the mean of its divisors is an integer number (1333318).

Almost surely, 2^9878947 is an apocalyptic number.

9878947 is a deficient number, since it is larger than the sum of its proper divisors (787597).

9878947 is a wasteful number, since it uses less digits than its factorization.

9878947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989.

The product of its digits is 1016064, while the sum is 52.

The square root of 9878947 is about 3143.0792226732. The cubic root of 9878947 is about 214.5706014209.

The spelling of 9878947 in words is "nine million, eight hundred seventy-eight thousand, nine hundred forty-seven".