9778481 has 4 divisors (see below), whose sum is σ = 10115700. Its totient is φ = 9441264.

The previous prime is 9778469. The next prime is 9778487. The reversal of 9778481 is 1848779.

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 2298256 + 7480225 = 1516^2 + 2735^2 .

It is a cyclic number.

It is not a de Polignac number, because 9778481 - 2¹⁸ = 9516337 is a prime.

It is a super-2 number, since 2×9778481² = 191237381334722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9778487) 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, 168566 + ... + 168623.

It is an arithmetic number, because the mean of its divisors is an integer number (2528925).

Almost surely, 2^9778481 is an apocalyptic number.

It is an amenable number.

9778481 is a deficient number, since it is larger than the sum of its proper divisors (337219).

9778481 is a wasteful number, since it uses less digits than its factorization.

9778481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337218.

The product of its digits is 112896, while the sum is 44.

The square root of 9778481 is about 3127.0562834717. The cubic root of 9778481 is about 213.8407482619.

The spelling of 9778481 in words is "nine million, seven hundred seventy-eight thousand, four hundred eighty-one".