9979854 has 8 divisors (see below), whose sum is σ = 19959720. Its totient is φ = 3326616.

The previous prime is 9979843. The next prime is 9979859. The reversal of 9979854 is 4589799.

It is a happy number.

9979854 is digitally balanced in base 2 and base 4, because in such bases 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.

9979854 is an admirable number.

It is a super-2 number, since 2×9979854² = 199194971722632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9979797 and 9979806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979859) 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, 831649 + ... + 831660.

It is an arithmetic number, because the mean of its divisors is an integer number (2494965).

Almost surely, 2^9979854 is an apocalyptic number.

9979854 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.

9979854 is a wasteful number, since it uses less digits than its factorization.

9979854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663314.

The product of its digits is 816480, while the sum is 51.

The square root of 9979854 is about 3159.0906919555. The cubic root of 9979854 is about 215.2986942677.

The spelling of 9979854 in words is "nine million, nine hundred seventy-nine thousand, eight hundred fifty-four".