680349 has 4 divisors (see below), whose sum is σ = 907136. Its totient is φ = 453564.

The previous prime is 680347. The next prime is 680353. The reversal of 680349 is 943086.

680349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 680349 - 2¹ = 680347 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

680349 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680341) 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, 113389 + ... + 113394.

It is an arithmetic number, because the mean of its divisors is an integer number (226784).

2⁶⁸⁰³⁴⁹ is an apocalyptic number.

It is an amenable number.

680349 is a deficient number, since it is larger than the sum of its proper divisors (226787).

680349 is a wasteful number, since it uses less digits than its factorization.

680349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226786.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 680349 is about 824.8327103116. The cubic root of 680349 is about 87.9516349247.

The spelling of 680349 in words is "six hundred eighty thousand, three hundred forty-nine".