680131 has 4 divisors (see below), whose sum is σ = 695992. Its totient is φ = 664272.

The previous prime is 680129. The next prime is 680159. The reversal of 680131 is 131086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131086 = 2 ⋅65543.

It is a cyclic number.

It is not a de Polignac number, because 680131 - 2¹ = 680129 is a prime.

It is a super-2 number, since 2×680131² = 925156354322, which contains 22 as substring.

It is a Duffinian number.

680131 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 680099 and 680108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680161) 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, 7866 + ... + 7951.

It is an arithmetic number, because the mean of its divisors is an integer number (173998).

2⁶⁸⁰¹³¹ is an apocalyptic number.

680131 is a deficient number, since it is larger than the sum of its proper divisors (15861).

680131 is a wasteful number, since it uses less digits than its factorization.

680131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15860.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 680131 is about 824.7005517156. The cubic root of 680131 is about 87.9422399893.

The spelling of 680131 in words is "six hundred eighty thousand, one hundred thirty-one".