680731 has 8 divisors (see below), whose sum is σ = 752544. Its totient is φ = 612480.

The previous prime is 680707. The next prime is 680749. The reversal of 680731 is 137086.

680731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 680731 - 2¹⁵ = 647963 is a prime.

It is a super-2 number, since 2×680731² = 926789388722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 680696 and 680705.

It is not an unprimeable number, because it can be changed into a prime (680431) 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, 480 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (94068).

2⁶⁸⁰⁷³¹ is an apocalyptic number.

680731 is a deficient number, since it is larger than the sum of its proper divisors (71813).

680731 is a wasteful number, since it uses less digits than its factorization.

680731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781.

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

The square root of 680731 is about 825.0642399232. The cubic root of 680731 is about 87.9680927712.

The spelling of 680731 in words is "six hundred eighty thousand, seven hundred thirty-one".