82768849 has 4 divisors (see below), whose sum is σ = 82787236. Its totient is φ = 82750464.

The previous prime is 82768811. The next prime is 82768859. The reversal of 82768849 is 94886728.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 739600 + 82029249 = 860^2 + 9057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82768849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82768796 and 82768805.

It is not an unprimeable number, because it can be changed into a prime (82768859) 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 3 ways as a sum of consecutive naturals, for example, 2617 + ... + 13129.

It is an arithmetic number, because the mean of its divisors is an integer number (20696809).

Almost surely, 2^82768849 is an apocalyptic number.

It is an amenable number.

82768849 is a deficient number, since it is larger than the sum of its proper divisors (18387).

82768849 is a wasteful number, since it uses less digits than its factorization.

82768849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18386.

The product of its digits is 1548288, while the sum is 52.

The square root of 82768849 is about 9097.7386750775. The cubic root of 82768849 is about 435.8017520980.

The spelling of 82768849 in words is "eighty-two million, seven hundred sixty-eight thousand, eight hundred forty-nine".