9917540 has 12 divisors (see below), whose sum is σ = 20826876. Its totient is φ = 3967008.

The previous prime is 9917539. The next prime is 9917549. The reversal of 9917540 is 457199.

It can be written as a sum of positive squares in 2 ways, for example, as 5885476 + 4032064 = 2426^2 + 2008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9917540.

It is not an unprimeable number, because it can be changed into a prime (9917549) 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, 247919 + ... + 247958.

It is an arithmetic number, because the mean of its divisors is an integer number (1735573).

Almost surely, 2^9917540 is an apocalyptic number.

It is an amenable number.

9917540 is an abundant number, since it is smaller than the sum of its proper divisors (10909336).

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

9917540 is a wasteful number, since it uses less digits than its factorization.

9917540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495886 (or 495884 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 9917540 is about 3149.2126000002. The cubic root of 9917540 is about 214.8496515117.

The spelling of 9917540 in words is "nine million, nine hundred seventeen thousand, five hundred forty".