680447 has 8 divisors (see below), whose sum is σ = 729600. Its totient is φ = 632664.

The previous prime is 680443. The next prime is 680453. The reversal of 680447 is 744086.

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 680447 - 2² = 680443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818 + ... + 1424.

It is an arithmetic number, because the mean of its divisors is an integer number (91200).

2⁶⁸⁰⁴⁴⁷ is an apocalyptic number.

680447 is a deficient number, since it is larger than the sum of its proper divisors (49153).

680447 is a wasteful number, since it uses less digits than its factorization.

680447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 680447 is about 824.8921141580. The cubic root of 680447 is about 87.9558576821.

The spelling of 680447 in words is "six hundred eighty thousand, four hundred forty-seven".