6945918949 has 2 divisors, whose sum is σ = 6945918950. Its totient is φ = 6945918948.

The previous prime is 6945918911. The next prime is 6945918953. The reversal of 6945918949 is 9498195496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5626050049 + 1319868900 = 75007^2 + 36330^2 .

It is a cyclic number.

It is not a de Polignac number, because 6945918949 - 2¹⁹ = 6945394661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6945918979) 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 as a sum of consecutive naturals, namely, 3472959474 + 3472959475.

It is an arithmetic number, because the mean of its divisors is an integer number (3472959475).

Almost surely, 2^6945918949 is an apocalyptic number.

It is an amenable number.

6945918949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6945918949 is an equidigital number, since it uses as much as digits as its factorization.

6945918949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25194240, while the sum is 64.

The square root of 6945918949 is about 83342.1798910972. The cubic root of 6945918949 is about 1907.9920922756.

The spelling of 6945918949 in words is "six billion, nine hundred forty-five million, nine hundred eighteen thousand, nine hundred forty-nine".