696809 has 2 divisors, whose sum is σ = 696810. Its totient is φ = 696808.

The previous prime is 696793. The next prime is 696811. The reversal of 696809 is 908696.

696809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426409 + 270400 = 653^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 696809 - 2⁴ = 696793 is a prime.

It is a Sophie Germain prime.

Together with 696811, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 696809.

It is not a weakly prime, because it can be changed into another prime (696889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348404 + 348405.

It is an arithmetic number, because the mean of its divisors is an integer number (348405).

2⁶⁹⁶⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

696809 is a deficient number, since it is larger than the sum of its proper divisors (1).

696809 is an equidigital number, since it uses as much as digits as its factorization.

696809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 696809 is about 834.7508610358. The cubic root of 696809 is about 88.6552755135.

The spelling of 696809 in words is "six hundred ninety-six thousand, eight hundred nine".