9678861 has 6 divisors (see below), whose sum is σ = 13980590. Its totient is φ = 6452568.

The previous prime is 9678857. The next prime is 9678863. The reversal of 9678861 is 1688769.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 260100 = 3069^2 + 510^2 .

It is not a de Polignac number, because 9678861 - 2² = 9678857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9678863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 537706 + ... + 537723.

Almost surely, 2^9678861 is an apocalyptic number.

It is an amenable number.

9678861 is a deficient number, since it is larger than the sum of its proper divisors (4301729).

9678861 is a wasteful number, since it uses less digits than its factorization.

9678861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075435 (or 1075432 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 9678861 is about 3111.0867876033. The cubic root of 9678861 is about 213.1120880658.

The spelling of 9678861 in words is "nine million, six hundred seventy-eight thousand, eight hundred sixty-one".