6945413809 has 2 divisors, whose sum is σ = 6945413810. Its totient is φ = 6945413808.

The previous prime is 6945413803. The next prime is 6945413821. The reversal of 6945413809 is 9083145496.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5647973409 + 1297440400 = 75153^2 + 36020^2 .

It is a cyclic number.

It is not a de Polignac number, because 6945413809 - 2⁷ = 6945413681 is a prime.

It is not a weakly prime, because it can be changed into another prime (6945413803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3472706904 + 3472706905.

It is an arithmetic number, because the mean of its divisors is an integer number (3472706905).

Almost surely, 2^6945413809 is an apocalyptic number.

It is an amenable number.

6945413809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6945413809 is an equidigital number, since it uses as much as digits as its factorization.

6945413809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 6945413809 is about 83339.1493177126. The cubic root of 6945413809 is about 1907.9458384251.

The spelling of 6945413809 in words is "six billion, nine hundred forty-five million, four hundred thirteen thousand, eight hundred nine".