8778913 has 12 divisors (see below), whose sum is σ = 10393684. Its totient is φ = 7365600.

The previous prime is 8778901. The next prime is 8778947. The reversal of 8778913 is 3198778.

It can be written as a sum of positive squares in 2 ways, for example, as 1982464 + 6796449 = 1408^2 + 2607^2 .

It is not a de Polignac number, because 8778913 - 2⁵ = 8778881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8778913.

It is not an unprimeable number, because it can be changed into a prime (8778013) 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 11 ways as a sum of consecutive naturals, for example, 1218 + ... + 4363.

Almost surely, 2^8778913 is an apocalyptic number.

It is an amenable number.

8778913 is a deficient number, since it is larger than the sum of its proper divisors (1614771).

8778913 is a wasteful number, since it uses less digits than its factorization.

8778913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5616 (or 5605 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The square root of 8778913 is about 2962.9230499627. The cubic root of 8778913 is about 206.2909844479.

The spelling of 8778913 in words is "eight million, seven hundred seventy-eight thousand, nine hundred thirteen".