680045 has 8 divisors (see below), whose sum is σ = 835296. Its totient is φ = 531216.

The previous prime is 680039. The next prime is 680059. The reversal of 680045 is 540086.

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 680045 - 2⁶ = 679981 is a prime.

It is a super-2 number, since 2×680045² = 924922404050, which contains 22 as substring.

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 680045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1367 + ... + 1796.

It is an arithmetic number, because the mean of its divisors is an integer number (104412).

2⁶⁸⁰⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

680045 is a deficient number, since it is larger than the sum of its proper divisors (155251).

680045 is a wasteful number, since it uses less digits than its factorization.

680045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 680045 is about 824.6484099300. The cubic root of 680045 is about 87.9385331782.

The spelling of 680045 in words is "six hundred eighty thousand, forty-five".