695681 has 16 divisors (see below), whose sum is σ = 864000. Its totient is φ = 547008.

The previous prime is 695677. The next prime is 695687. The reversal of 695681 is 186596.

It is not a de Polignac number, because 695681 - 2² = 695677 is a prime.

It is a super-2 number, since 2×695681² = 967944107522, which contains 22 as substring.

It is a Duffinian number.

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 695681.

It is not an unprimeable number, because it can be changed into a prime (695687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4595 + ... + 4743.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2⁶⁹⁵⁶⁸¹ is an apocalyptic number.

It is an amenable number.

695681 is a deficient number, since it is larger than the sum of its proper divisors (168319).

695681 is a wasteful number, since it uses less digits than its factorization.

695681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its digits is 12960, while the sum is 35.

The square root of 695681 is about 834.0749366814. The cubic root of 695681 is about 88.6074110527.

The spelling of 695681 in words is "six hundred ninety-five thousand, six hundred eighty-one".