9917481 has 8 divisors (see below), whose sum is σ = 15112384. Its totient is φ = 5667120.

The previous prime is 9917473. The next prime is 9917483. The reversal of 9917481 is 1847199.

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 9917481 - 2³ = 9917473 is a prime.

It is a super-2 number, since 2×9917481² = 196712858770722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9917483) 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, 236110 + ... + 236151.

It is an arithmetic number, because the mean of its divisors is an integer number (1889048).

Almost surely, 2^9917481 is an apocalyptic number.

It is an amenable number.

9917481 is a deficient number, since it is larger than the sum of its proper divisors (5194903).

9917481 is a wasteful number, since it uses less digits than its factorization.

9917481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472271.

The product of its digits is 18144, while the sum is 39.

The square root of 9917481 is about 3149.2032325653. The cubic root of 9917481 is about 214.8492254600.

The spelling of 9917481 in words is "nine million, nine hundred seventeen thousand, four hundred eighty-one".