681701 has 4 divisors (see below), whose sum is σ = 717600. Its totient is φ = 645804.

The previous prime is 681689. The next prime is 681719. The reversal of 681701 is 107186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 107186 = 2 ⋅53593.

It is a cyclic number.

It is not a de Polignac number, because 681701 - 2¹⁸ = 419557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681701.

It is not an unprimeable number, because it can be changed into a prime (681731) 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 in 3 ways as a sum of consecutive naturals, for example, 17921 + ... + 17958.

It is an arithmetic number, because the mean of its divisors is an integer number (179400).

2⁶⁸¹⁷⁰¹ is an apocalyptic number.

It is an amenable number.

681701 is a deficient number, since it is larger than the sum of its proper divisors (35899).

681701 is a wasteful number, since it uses less digits than its factorization.

681701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35898.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 681701 is about 825.6518636811. The cubic root of 681701 is about 88.0098559898.

Adding to 681701 its reverse (107186), we get a palindrome (788887).

The spelling of 681701 in words is "six hundred eighty-one thousand, seven hundred one".