9979806 has 8 divisors (see below), whose sum is σ = 19959624. Its totient is φ = 3326600.

The previous prime is 9979789. The next prime is 9979811. The reversal of 9979806 is 6089799.

It is a happy number.

9979806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

9979806 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831645 + ... + 831656.

It is an arithmetic number, because the mean of its divisors is an integer number (2494953).

Almost surely, 2^9979806 is an apocalyptic number.

9979806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9979806 is a wasteful number, since it uses less digits than its factorization.

9979806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663306.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 9979806 is about 3159.0830948236. The cubic root of 9979806 is about 215.2983490938.

The spelling of 9979806 in words is "nine million, nine hundred seventy-nine thousand, eight hundred six".