681703 has 8 divisors (see below), whose sum is σ = 769680. Its totient is φ = 598080.

The previous prime is 681689. The next prime is 681719. The reversal of 681703 is 307186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681703 - 2¹⁷ = 550631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750 + ... + 1387.

It is an arithmetic number, because the mean of its divisors is an integer number (96210).

2⁶⁸¹⁷⁰³ is an apocalyptic number.

681703 is a deficient number, since it is larger than the sum of its proper divisors (87977).

681703 is a wasteful number, since it uses less digits than its factorization.

681703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 681703 is about 825.6530748444. The cubic root of 681703 is about 88.0099420585.

Adding to 681703 its reverse (307186), we get a palindrome (988889).

It can be divided in two parts, 68 and 1703, that added together give a palindrome (1771).

The spelling of 681703 in words is "six hundred eighty-one thousand, seven hundred three".