680869 has 8 divisors (see below), whose sum is σ = 812160. Its totient is φ = 558096.

The previous prime is 680861. The next prime is 680873. The reversal of 680869 is 968086.

680869 = T₂₂ + T₂₃ + ... + T₁₅₉.

680869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 680869 - 2³ = 680861 is a prime.

It is a super-2 number, since 2×680869² = 927165190322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680861) 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, 1954 + ... + 2275.

It is an arithmetic number, because the mean of its divisors is an integer number (101520).

2⁶⁸⁰⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

680869 is a deficient number, since it is larger than the sum of its proper divisors (131291).

680869 is a wasteful number, since it uses less digits than its factorization.

680869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 680869 is about 825.1478655368. The cubic root of 680869 is about 87.9740367621.

The spelling of 680869 in words is "six hundred eighty thousand, eight hundred sixty-nine".