9978712 has 16 divisors (see below), whose sum is σ = 18990360. Its totient is φ = 4914624.

The previous prime is 9978659. The next prime is 9978719. The reversal of 9978712 is 2178799.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978719) 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, 8773 + ... + 9844.

Almost surely, 2^9978712 is an apocalyptic number.

It is an amenable number.

9978712 is a deficient number, since it is larger than the sum of its proper divisors (9011648).

9978712 is a wasteful number, since it uses less digits than its factorization.

9978712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18690 (or 18686 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 9978712 is about 3158.9099385706. The cubic root of 9978712 is about 215.2904817064.

It can be divided in two parts, 99787 and 12, that added together give a palindrome (99799).

The spelling of 9978712 in words is "nine million, nine hundred seventy-eight thousand, seven hundred twelve".