9978117 has 8 divisors (see below), whose sum is σ = 13763040. Its totient is φ = 6422640.

The previous prime is 9978103. The next prime is 9978119. The reversal of 9978117 is 7118799.

It is a happy number.

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

It is not a de Polignac number, because 9978117 - 2¹² = 9974021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57259 + ... + 57432.

It is an arithmetic number, because the mean of its divisors is an integer number (1720380).

Almost surely, 2^9978117 is an apocalyptic number.

It is an amenable number.

9978117 is a deficient number, since it is larger than the sum of its proper divisors (3784923).

9978117 is a wasteful number, since it uses less digits than its factorization.

9978117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114723.

The product of its digits is 31752, while the sum is 42.

The square root of 9978117 is about 3158.8157591097. The cubic root of 9978117 is about 215.2862025842.

Multiplying 9978117 by its sum of digits (42), we get a palindrome (419080914).

The spelling of 9978117 in words is "nine million, nine hundred seventy-eight thousand, one hundred seventeen".