680449 has 8 divisors (see below), whose sum is σ = 848448. Its totient is φ = 530160.

The previous prime is 680443. The next prime is 680453. The reversal of 680449 is 944086.

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 680449 - 2³ = 680441 is a prime.

It is an Ulam 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 680449.

It is not an unprimeable number, because it can be changed into a prime (680441) 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, 4342 + ... + 4495.

It is an arithmetic number, because the mean of its divisors is an integer number (106056).

2⁶⁸⁰⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

680449 is a deficient number, since it is larger than the sum of its proper divisors (167999).

680449 is a wasteful number, since it uses less digits than its factorization.

680449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8855.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 680449 is about 824.8933264368. The cubic root of 680449 is about 87.9559438566.

The spelling of 680449 in words is "six hundred eighty thousand, four hundred forty-nine".