253768849 has 4 divisors (see below), whose sum is σ = 253920436. Its totient is φ = 253617264.

The previous prime is 253768817. The next prime is 253768859. The reversal of 253768849 is 948867352.

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 169000000 + 84768849 = 13000^2 + 9207^2 .

It is a cyclic number.

It is not a de Polignac number, because 253768849 - 2⁵ = 253768817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253768796 and 253768805.

It is not an unprimeable number, because it can be changed into a prime (253768859) 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 3 ways as a sum of consecutive naturals, for example, 73254 + ... + 76639.

It is an arithmetic number, because the mean of its divisors is an integer number (63480109).

Almost surely, 2^253768849 is an apocalyptic number.

It is an amenable number.

253768849 is a deficient number, since it is larger than the sum of its proper divisors (151587).

253768849 is a wasteful number, since it uses less digits than its factorization.

253768849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151586.

The product of its digits is 2903040, while the sum is 52.

The square root of 253768849 is about 15930.1239480426. The cubic root of 253768849 is about 633.1103839138.

It can be divided in two parts, 25376 and 8849, that added together give a square (34225 = 185²).

The spelling of 253768849 in words is "two hundred fifty-three million, seven hundred sixty-eight thousand, eight hundred forty-nine".