9978841 has 8 divisors (see below), whose sum is σ = 10200960. Its totient is φ = 9759312.

The previous prime is 9978833. The next prime is 9978877. The reversal of 9978841 is 1488799.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9978841 - 2³ = 9978833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9978791 and 9978800.

It is not an unprimeable number, because it can be changed into a prime (9978811) 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 7 ways as a sum of consecutive naturals, for example, 8496 + ... + 9598.

It is an arithmetic number, because the mean of its divisors is an integer number (1275120).

Almost surely, 2^9978841 is an apocalyptic number.

It is an amenable number.

9978841 is a deficient number, since it is larger than the sum of its proper divisors (222119).

9978841 is a wasteful number, since it uses less digits than its factorization.

9978841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295.

The product of its digits is 145152, while the sum is 46.

The square root of 9978841 is about 3158.9303569405. The cubic root of 9978841 is about 215.2914094264.

The spelling of 9978841 in words is "nine million, nine hundred seventy-eight thousand, eight hundred forty-one".