9878705 has 16 divisors (see below), whose sum is σ = 12361680. Its totient is φ = 7569408.

The previous prime is 9878657. The next prime is 9878731. The reversal of 9878705 is 5078789.

It can be written as a sum of positive squares in 8 ways, for example, as 564001 + 9314704 = 751^2 + 3052^2 .

It is a cyclic number.

It is not a de Polignac number, because 9878705 - 2¹⁸ = 9616561 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 27809 + ... + 28161.

It is an arithmetic number, because the mean of its divisors is an integer number (772605).

Almost surely, 2^9878705 is an apocalyptic number.

It is an amenable number.

9878705 is a deficient number, since it is larger than the sum of its proper divisors (2482975).

9878705 is a wasteful number, since it uses less digits than its factorization.

9878705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 141120, while the sum is 44.

The square root of 9878705 is about 3143.0407251577. The cubic root of 9878705 is about 214.5688493277.

The spelling of 9878705 in words is "nine million, eight hundred seventy-eight thousand, seven hundred five".