9997854 has 8 divisors (see below), whose sum is σ = 19995720. Its totient is φ = 3332616.

The previous prime is 9997831. The next prime is 9997859. The reversal of 9997854 is 4587999.

It is a happy number.

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

9997854 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 9997797 and 9997806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833149 + ... + 833160.

It is an arithmetic number, because the mean of its divisors is an integer number (2499465).

Almost surely, 2^9997854 is an apocalyptic number.

9997854 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.

9997854 is a wasteful number, since it uses less digits than its factorization.

9997854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666314.

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

The square root of 9997854 is about 3161.9383295694. The cubic root of 9997854 is about 215.4280565111.

The spelling of 9997854 in words is "nine million, nine hundred ninety-seven thousand, eight hundred fifty-four".