9997842 has 8 divisors (see below), whose sum is σ = 19995696. Its totient is φ = 3332612.

The previous prime is 9997831. The next prime is 9997859. The reversal of 9997842 is 2487999.

It is a happy number.

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

9997842 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 9997791 and 9997800.

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, 833148 + ... + 833159.

It is an arithmetic number, because the mean of its divisors is an integer number (2499462).

Almost surely, 2^9997842 is an apocalyptic number.

9997842 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.

9997842 is a wasteful number, since it uses less digits than its factorization.

9997842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666312.

The product of its digits is 326592, while the sum is 48.

The square root of 9997842 is about 3161.9364319986. The cubic root of 9997842 is about 215.4279703214.

The spelling of 9997842 in words is "nine million, nine hundred ninety-seven thousand, eight hundred forty-two".