695689 has 2 divisors, whose sum is σ = 695690. Its totient is φ = 695688.

The previous prime is 695687. The next prime is 695701. The reversal of 695689 is 986596.

695689 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., 462400 + 233289 = 680^2 + 483^2 .

It is a cyclic number.

It is not a de Polignac number, because 695689 - 2¹ = 695687 is a prime.

It is a super-3 number, since 3×695689³ = 1010105333386103307, which contains 333 as substring.

Together with 695687, it forms a pair of twin primes.

695689 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (695687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347844 + 347845.

It is an arithmetic number, because the mean of its divisors is an integer number (347845).

2⁶⁹⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

695689 is a deficient number, since it is larger than the sum of its proper divisors (1).

695689 is an equidigital number, since it uses as much as digits as its factorization.

695689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 695689 is about 834.0797323997. The cubic root of 695689 is about 88.6077506990.

The spelling of 695689 in words is "six hundred ninety-five thousand, six hundred eighty-nine".