9780705 has 24 divisors (see below), whose sum is σ = 18495360. Its totient is φ = 4741920.

The previous prime is 9780647. The next prime is 9780721. The reversal of 9780705 is 5070879.

It is not a de Polignac number, because 9780705 - 2⁷ = 9780577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9780705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9385 + ... + 10374.

It is an arithmetic number, because the mean of its divisors is an integer number (770640).

Almost surely, 2^9780705 is an apocalyptic number.

It is an amenable number.

9780705 is a deficient number, since it is larger than the sum of its proper divisors (8714655).

9780705 is a wasteful number, since it uses less digits than its factorization.

9780705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19781 (or 19778 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 9780705 is about 3127.4118692619. The cubic root of 9780705 is about 213.8569588837.

The spelling of 9780705 in words is "nine million, seven hundred eighty thousand, seven hundred five".