695007809 has 2 divisors, whose sum is σ = 695007810. Its totient is φ = 695007808.

The previous prime is 695007779. The next prime is 695007857. The reversal of 695007809 is 908700596.

695007809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571353409 + 123654400 = 23903^2 + 11120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-695007809 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 695007809.

It is not a weakly prime, because it can be changed into another prime (695007869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347503904 + 347503905.

It is an arithmetic number, because the mean of its divisors is an integer number (347503905).

Almost surely, 2^695007809 is an apocalyptic number.

It is an amenable number.

695007809 is a deficient number, since it is larger than the sum of its proper divisors (1).

695007809 is an equidigital number, since it uses as much as digits as its factorization.

695007809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 695007809 is about 26363.0007586390. Note that the first 3 decimals coincide. The cubic root of 695007809 is about 885.7882085953.

The spelling of 695007809 in words is "six hundred ninety-five million, seven thousand, eight hundred nine".