695581 has 2 divisors, whose sum is σ = 695582. Its totient is φ = 695580.

The previous prime is 695573. The next prime is 695593. The reversal of 695581 is 185596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695556 + 25 = 834^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 695581 - 2³ = 695573 is a prime.

It is a super-2 number, since 2×695581² = 967665855122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (695561) 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, 347790 + 347791.

It is an arithmetic number, because the mean of its divisors is an integer number (347791).

2⁶⁹⁵⁵⁸¹ is an apocalyptic number.

It is an amenable number.

695581 is a deficient number, since it is larger than the sum of its proper divisors (1).

695581 is an equidigital number, since it uses as much as digits as its factorization.

695581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 695581 is about 834.0149878749. The cubic root of 695581 is about 88.6031652534.

The spelling of 695581 in words is "six hundred ninety-five thousand, five hundred eighty-one".