695509 has 2 divisors, whose sum is σ = 695510. Its totient is φ = 695508.

The previous prime is 695503. The next prime is 695561. The reversal of 695509 is 905596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 14884 = 825^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 695509 - 2⁵ = 695477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (695503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347754 + 347755.

It is an arithmetic number, because the mean of its divisors is an integer number (347755).

2⁶⁹⁵⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

695509 is a deficient number, since it is larger than the sum of its proper divisors (1).

695509 is an equidigital number, since it uses as much as digits as its factorization.

695509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 695509 is about 833.9718220659. The cubic root of 695509 is about 88.6001080259.

The spelling of 695509 in words is "six hundred ninety-five thousand, five hundred nine".