1658768849 has 2 divisors, whose sum is σ = 1658768850. Its totient is φ = 1658768848.

The previous prime is 1658768833. The next prime is 1658768851. The reversal of 1658768849 is 9488678561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1510099600 + 148669249 = 38860^2 + 12193^2 .

It is a cyclic number.

It is not a de Polignac number, because 1658768849 - 2⁴ = 1658768833 is a prime.

Together with 1658768851, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1658768791 and 1658768800.

It is not a weakly prime, because it can be changed into another prime (1658768879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829384424 + 829384425.

It is an arithmetic number, because the mean of its divisors is an integer number (829384425).

Almost surely, 2^1658768849 is an apocalyptic number.

It is an amenable number.

1658768849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1658768849 is an equidigital number, since it uses as much as digits as its factorization.

1658768849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 62.

The square root of 1658768849 is about 40727.9860660947. The cubic root of 1658768849 is about 1183.7553558579.

The spelling of 1658768849 in words is "one billion, six hundred fifty-eight million, seven hundred sixty-eight thousand, eight hundred forty-nine".