695809 has 2 divisors, whose sum is σ = 695810. Its totient is φ = 695808.

The previous prime is 695801. The next prime is 695839. The reversal of 695809 is 908596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672400 + 23409 = 820^2 + 153^2 .

It is a cyclic number.

It is not a de Polignac number, because 695809 - 2³ = 695801 is a prime.

It is not a weakly prime, because it can be changed into another prime (695801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347904 + 347905.

It is an arithmetic number, because the mean of its divisors is an integer number (347905).

2⁶⁹⁵⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

695809 is a deficient number, since it is larger than the sum of its proper divisors (1).

695809 is an equidigital number, since it uses as much as digits as its factorization.

695809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 695809 is about 834.1516648668. The cubic root of 695809 is about 88.6128450821.

The spelling of 695809 in words is "six hundred ninety-five thousand, eight hundred nine".