9816979 has 4 divisors (see below), whose sum is σ = 9824320. Its totient is φ = 9809640.

The previous prime is 9816971. The next prime is 9816997. The reversal of 9816979 is 9796189.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9816979 - 2³ = 9816971 is a prime.

It is a Duffinian number.

9816979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9816971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032 + ... + 4549.

It is an arithmetic number, because the mean of its divisors is an integer number (2456080).

Almost surely, 2^9816979 is an apocalyptic number.

9816979 is a deficient number, since it is larger than the sum of its proper divisors (7341).

9816979 is a wasteful number, since it uses less digits than its factorization.

9816979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340.

The product of its digits is 244944, while the sum is 49.

The square root of 9816979 is about 3133.2058662016. The cubic root of 9816979 is about 214.1210120013.

The spelling of 9816979 in words is "nine million, eight hundred sixteen thousand, nine hundred seventy-nine".