680437 has 4 divisors (see below), whose sum is σ = 687276. Its totient is φ = 673600.

The previous prime is 680431. The next prime is 680441. The reversal of 680437 is 734086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 531441 + 148996 = 729^2 + 386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680437 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 (680431) 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, 3268 + ... + 3469.

It is an arithmetic number, because the mean of its divisors is an integer number (171819).

2⁶⁸⁰⁴³⁷ is an apocalyptic number.

It is an amenable number.

680437 is a deficient number, since it is larger than the sum of its proper divisors (6839).

680437 is a wasteful number, since it uses less digits than its factorization.

680437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 680437 is about 824.8860527370. The cubic root of 680437 is about 87.9554268071.

The spelling of 680437 in words is "six hundred eighty thousand, four hundred thirty-seven".