9783540491 has 8 divisors (see below), whose sum is σ = 9841245120. Its totient is φ = 9725994432.

The previous prime is 9783540479. The next prime is 9783540607. The reversal of 9783540491 is 1940453879.

9783540491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9783540491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9783540451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85271 + ... + 163823.

It is an arithmetic number, because the mean of its divisors is an integer number (1230155640).

Almost surely, 2^9783540491 is an apocalyptic number.

9783540491 is a deficient number, since it is larger than the sum of its proper divisors (57704629).

9783540491 is a wasteful number, since it uses less digits than its factorization.

9783540491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79285.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 9783540491 is about 98911.7813559133. The cubic root of 9783540491 is about 2138.7762306874.

The spelling of 9783540491 in words is "nine billion, seven hundred eighty-three million, five hundred forty thousand, four hundred ninety-one".