9906481 has 4 divisors (see below), whose sum is σ = 10668532. Its totient is φ = 9144432.

The previous prime is 9906473. The next prime is 9906493. The reversal of 9906481 is 1846099.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4223025 + 5683456 = 2055^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 9906481 - 2³ = 9906473 is a prime.

It is a super-2 number, since 2×9906481² = 196276731606722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9906481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9906401) 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, 381006 + ... + 381031.

It is an arithmetic number, because the mean of its divisors is an integer number (2667133).

Almost surely, 2^9906481 is an apocalyptic number.

It is an amenable number.

9906481 is a deficient number, since it is larger than the sum of its proper divisors (762051).

9906481 is a wasteful number, since it uses less digits than its factorization.

9906481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762050.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 9906481 is about 3147.4562745176. The cubic root of 9906481 is about 214.7697625471.

The spelling of 9906481 in words is "nine million, nine hundred six thousand, four hundred eighty-one".