9878769 has 12 divisors (see below), whose sum is σ = 14306292. Its totient is φ = 6568800.

The previous prime is 9878749. The next prime is 9878773. The reversal of 9878769 is 9678789.

It can be written as a sum of positive squares in 2 ways, for example, as 950625 + 8928144 = 975^2 + 2988^2 .

It is not a de Polignac number, because 9878769 - 2⁹ = 9878257 is a prime.

It is a super-2 number, since 2×9878769² = 195180153910722, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9878749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2959 + ... + 5339.

It is an arithmetic number, because the mean of its divisors is an integer number (1192191).

Almost surely, 2^9878769 is an apocalyptic number.

It is an amenable number.

9878769 is a deficient number, since it is larger than the sum of its proper divisors (4427523).

9878769 is a wasteful number, since it uses less digits than its factorization.

9878769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848 (or 2845 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 9878769 is about 3143.0509063647. The cubic root of 9878769 is about 214.5693126940.

The spelling of 9878769 in words is "nine million, eight hundred seventy-eight thousand, seven hundred sixty-nine".