681753 has 4 divisors (see below), whose sum is σ = 909008. Its totient is φ = 454500.

The previous prime is 681731. The next prime is 681763. The reversal of 681753 is 357186.

681753 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 681753 - 2⁶ = 681689 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681753.

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 3 ways as a sum of consecutive naturals, for example, 113623 + ... + 113628.

It is an arithmetic number, because the mean of its divisors is an integer number (227252).

2⁶⁸¹⁷⁵³ is an apocalyptic number.

It is an amenable number.

681753 is a deficient number, since it is larger than the sum of its proper divisors (227255).

681753 is a wasteful number, since it uses less digits than its factorization.

681753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227254.

The product of its digits is 5040, while the sum is 30.

The square root of 681753 is about 825.6833533504. The cubic root of 681753 is about 88.0120937236.

The spelling of 681753 in words is "six hundred eighty-one thousand, seven hundred fifty-three".