9917072 has 60 divisors (see below), whose sum is σ = 22032816. Its totient is φ = 4287360.

The previous prime is 9917059. The next prime is 9917077. The reversal of 9917072 is 2707199.

It is not an unprimeable number, because it can be changed into a prime (9917077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147983 + ... + 148049.

Almost surely, 2^9917072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9917072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11016408).

9917072 is an abundant number, since it is smaller than the sum of its proper divisors (12115744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9917072 is a wasteful number, since it uses less digits than its factorization.

9917072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 9917072 is about 3149.1382948356. The cubic root of 9917072 is about 214.8462719365.

It can be divided in two parts, 99 and 17072, that added together give a palindrome (17171).

The spelling of 9917072 in words is "nine million, nine hundred seventeen thousand, seventy-two".